Avilution

Huntsville AL US 35824 115 Houston Goodson Way SW markster@avilution.com

Bloomberg

New York NY US edguy@eguy.org

Avilution

Huntsville AL US 35824 115 Houston Goodson Way SW nick@avilution.com

General Internet Engineering Task Force avionics This document presents a binary IP-based protocol to facilitate interoperable communications between electronic equipment on a platform. The protocol is UDP-based, stateless, and multicast. Messages consist of a common header followed by a series of parameters and related attributes. The parameters are always informational, e.g., indicating airspeed is 150 kts, but parameter attributes can be set to indicate intent, e.g., this parameter contains a new user selected value such as an instruction that deploys the landing gear. Although initially designed for avionics, it can be applied to other platform domains as well. This document defines the core protocol and a method to extend it to meet any domain specific needs.

Introduction Historically, avionics and other networked equipment platforms have used private protocols for device interconnection but the trend is towards open communication leveraging standard hardware. There have been various stages in the evolution of device interconnection from point-to-point analog communication to digital serial protocols, to bus-based solutions and currently IP-based over ethernet. One of the concerns with all of these protocols in this industry is that extensive testing is required, so developing a common protocol and library with its extensive test cases will improve time to market, product quality and safety, and lower cost. The eXtensible Stateless Equipment Data Exchange, XSEDE, is such an IP-based protocol which provides a common means that facilitates parameter communication between networked equipment. It is an open protocol which typically operates by sending binary-encoded data in UDP packets using common Multicast over Ethernet. Typical implementation environments contain legacy networks such as CAN bus and components that have various levels of certification, e.g., levels per DO-178 . This approach allows the networked platform to function as a collection of safety-critical microservices with XSEDE at the hub. XSEDE can flexibly drive multiple displays and unify all the subsystems all at the control of the system integrator. Parameters generally fall into two separate categories: schedule-driven and event-driven. Schedule-driven parameters are those that are sent periodically by the nodes in the system. One example could be the current heading might be reported by a sensor at 10hz. These parameters have a logical expiration time associated with how long they are valid, for example, 250ms. Another example could be the current air temperature or even the current value of the pilot's desired heading (heading bug.) Event driven parameters are those that occur in response to an external stimuli, e.g., a pilot action on a switch, or an autopilot deciding to change the heading due to reaching an intermediate waypoint. These parameters do not have a logical expiration time associated with how long they are valid.

Basic Properties XSEDE is a simple and compact protocol which uses a fast marshaling approach. Parameters may be coalesced, size and time permitting, into a single message to make transport more efficient. The message layout considers four octet alignment issues which can affect performance, especially on ARM-based architectures and pads to maintain efficiency. All messages are sent to all receivers so that the protocol is stateless and only the recipient controls whether a parameter will be processed. Since avionics software is subject to intensive testing and validation, XSEDE is designed to be deterministic with the fewest number of formal requirements required for implementation while still permitting the addition of new data formats and parameters through an extensible data model. The parameter identifier is designed to allow for either global data model additions so all nodes are aware or local data model additions if the parameter is only relevant to a subset of nodes. User and System selected events can exhibit two distinct behaviors: an event that causes an immediate change, e.g., a radio frequency change, and those changes in which a change may take time to be reflected by the system, e.g., selecting a new flap position. In the former case, only one parameter is defined: a request would set the confidence field to USERSEL (or SYSSEL). At the same time, the radio would periodically report with the current setting. In the latter case, these settings are implemented with a pair of parameters, a request (REQ suffix) and a current state Parameter that has no specific suffix. For example, FLAPREQ and FLAPPOS (See ) where the first indicates the requested value and the second indicates the actual value. An example of the stateless nature of the protocol can be seen when comparing sample use cases of a few parameters (See ). The first example is a simple system with a user interface node and a radio control node where the user interface node sends a COMFREQ parameter in an XSEDE message to set the radio frequency. The time for the frequency change to be reported is generally negligible, so a COMFREQ parameter with a confidence of USERSEL/SYSSEL for setting the frequency and a COMFREQ parameter with a confidence of RAW from the radio control node for reporting the current frequency is usually sufficient. The second example is a system with a user interface node and a flap control node where the user interface node would send a FLAPREQ parameter and then report the FLAPPOS parameter sent by the flap control node to inform the pilot of the current state of the flaps. This allows the user interface to be able to set a requested flap state without having to worry about the transition period for a given systems flaps while not precluding the ability to generate a CAS message if the flaps do not change position in a specific amount of time.

Drawbacks XSEDE is a UDP-based protocol so packet delivery is not guaranteed. XSEDE is typically run on a purpose built network within a specific aircraft or other high reliability networks, therefore the `best-effort` nature of UDP is not of grave concern. Application-level behavior is implemented to ensure critical requests are executed. Since the protocol is stateless, it relies on the requestor to monitor status to ensure an action was taken. For example, if a request to put the landing gear down is made, the requesting application must watch reports of the landing gear position and alert if the request is not satisfied in a timely manner. However, you would be able to see if your request was correctly interpreted by a report, periodic or in response to the event, by the responsible nodes. Notably, the protocol does not contain the concept of incrementing or decrementing a value, just setting a specific value. A user interface which is designed to increment and decrement a value based on a user turning a knob, for example, must track the current value and when an increment is detected, transmit the new, incremented value with the appropriate confidence (most likely USERSEL). If two or more applications are monitoring the same knob from two different computers, they each would be able to redundantly send the same new value without affecting the behavior whether one, two or more such applications were concurrently running.

Terminology The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT", "SHOULD", "SHOULD NOT", "RECOMMENDED", "NOT RECOMMENDED", "MAY", and "OPTIONAL" in this document are to be interpreted as described in BCP 14 when, and only when, they appear in all capitals, as shown here.

Message:

is the basic unit of communication in XSEDE.

Node:

is a device or process that implements XSEDE.

Parameter:

is the task specific payload contained in a message.

Attribute Format:

are the simple and structured data types associated with a parameter attribute.

Attributes:

are the values associated with a parameter.

Dictionary:

is a set of allowed values associated with an attribute, parameter, or message field.

Source ID:

Refers to the unique number which identifies the node, by convention with the upper octet representing the computer and the lower octet representing the application number within that computer.

Overview of XSEDE Protocol The eXtensible Stateless Equipment Data Exchange is designed to operate on an integrated local network and comprises instruments, displays, sensors, and actuators performing various functions. XSEDE messages are sent to every node on the network. XSEDE messages are currently in one of three classes: Maintenance, Operational and Raw. Maintenance and Operational messages consist of a header followed by a series of parameters. Parameters always represent information, a message is purely a collection of parameters. However, the confidence field must be interpreted to determine intent, i.e., the SYSSEL and USERSEL confidence levels MUST be interpreted by responsible nodes to affect changes on the relevant items. XSEDE is stateless. There is no required protocol level response to any command, however, informational responses may be made. For instance, a command to change the radio frequency of a certain radio may generate a application-level response indicating the new radio frequency. All XSEDE messages go to all nodes which ignore messages by checking for relevant parameters by identifier. Raw XSEDE messages consist of a message header which specifies the length of the raw data, followed by that raw data. Raw data is classified as MIL-STD-1553, CANbus, digital samples, GDL90 data , or other serial or streaming unframed data. Each node in XSEDE is assigned a source ID. These Source IDs MUST be unique within the XSEDE network. The Source ID and the message number uniquely identify the message and are contained in the message header. Message IDs created by a node MUST be monotonically increasing. A receiving node MUST ignore all duplicate messages. The Source ID and a message number are used to ensure messages are processed in order and only once. Messages MUST be processed in order skipping any missing messages and MUST only be processed once. Senders and Receivers must account for integer overflow in message numbers. There is no retry mechanism at the protocol level; Missing and out-of-order messages SHALL be considered lost and if received out of order, a message MUST be ignored. In addition to the Source ID and Message Number, The XSEDE message header also contains the message class, the Message Operation ID, Flags, the confidence level currently for Avionics, and the payload length. For best performance, an XSEDE goal is to not send IP datagrams that have to be fragmented. Packets which exceed the MSS size will be fragmented. To achieve this goal XSEDE messages SHOULD be less than the network Maximum Segment Size (MSS) size in length. On a modern Ethernet network, IEEE 802.3 specifies a standard maximum payload size of 1500 bytes. The size of the fixed IPv4 header is 20 bytes or in IPv6 the fixed header is 40 bytes UDP headers consume 8 bytes, the XSEDE header uses 12 bytes leaving 1460 bytes for parameters or 1440 bytes on an IPv6 network.

xfsdatamodel The xfsdatamodel tag is the root element for the XSEDE XML datamodel. The following subsections show the descendant elements and their attributes.

structures

structure structure

Attribute	Mandatory	Definition	Default
name	Yes	Mandatory name for this parameter format which may only contain lower case letters a-z, underscore ('_') and digits 0-9 after the first non-digit character.	No
definition	No	Human readable description of the purpose of this item.	No

int8 - 8-bit two's complement signed integer int8

Attribute	Mandatory	Definition	Default
length	No	If specified, this field is actually an array of this length. Note that charrays can have a length of zero only if at the end of a structure, implying there will be a buffer immediately following.	No
divisor	No	If specified, the the value of this field is divided by this to obtain a (floating point) number of units.	No
minval	No	The minimum valid value can be found in this field	No
maxval	No	The maximum valid value can be found in this field	No
clowval	No	The value below which caution should be exercised can be found in this field	No
chighval	No	The value above which caution should be exercised can be found in this field	No
units	No	What units (e.g. seconds, pounds, etc) is this field provided in? The units must exist in the param_units dictionary.	No
interpret	No	If specified, interpret this field using the given Dictionary	No
defrange	No	If specified, references a predefined range for interpretation of the value.	No

uint8 - 8-bit unsigned integer uint8

Attribute	Mandatory	Definition	Default
length	No	If specified, this field is actually an array of this length. Note that charrays can have a length of zero only if at the end of a structure, implying there will be a buffer immediately following.	No
divisor	No	If specified, the the value of this field is divided by this to obtain a (floating point) number of units.	No
minval	No	The minimum valid value can be found in this field	No
maxval	No	The maximum valid value can be found in this field	No
clowval	No	The value below which caution should be exercised can be found in this field	No
chighval	No	The value above which caution should be exercised can be found in this field	No
units	No	What units (e.g. seconds, pounds, etc) is this field provided in? The units must exist in the param_units dictionary.	No
interpret	No	If specified, interpret this field using the given Dictionary	No
defrange	No	If specified, references a predefined range for interpretation of the value.	No

int16 - 16-bit two's complement signed integer int16

Attribute	Mandatory	Definition	Default
length	No	If specified, this field is actually an array of this length. Note that charrays can have a length of zero only if at the end of a structure, implying there will be a buffer immediately following.	No
divisor	No	If specified, the the value of this field is divided by this to obtain a (floating point) number of units.	No
minval	No	The minimum valid value can be found in this field	No
maxval	No	The maximum valid value can be found in this field	No
clowval	No	The value below which caution should be exercised can be found in this field	No
chighval	No	The value above which caution should be exercised can be found in this field	No
units	No	What units (e.g. seconds, pounds, etc) is this field provided in? The units must exist in the param_units dictionary.	No
interpret	No	If specified, interpret this field using the given Dictionary	No
defrange	No	If specified, references a predefined range for interpretation of the value.	No

uint16 - 16-bit unsigned integer uint16

Attribute	Mandatory	Definition	Default
length	No	If specified, this field is actually an array of this length. Note that charrays can have a length of zero only if at the end of a structure, implying there will be a buffer immediately following.	No
divisor	No	If specified, the the value of this field is divided by this to obtain a (floating point) number of units.	No
minval	No	The minimum valid value can be found in this field	No
maxval	No	The maximum valid value can be found in this field	No
clowval	No	The value below which caution should be exercised can be found in this field	No
chighval	No	The value above which caution should be exercised can be found in this field	No
units	No	What units (e.g. seconds, pounds, etc) is this field provided in? The units must exist in the param_units dictionary.	No
interpret	No	If specified, interpret this field using the given Dictionary	No
defrange	No	If specified, references a predefined range for interpretation of the value.	No

int32 - 32-bit two's complement signed integer int32

Attribute	Mandatory	Definition	Default
length	No	If specified, this field is actually an array of this length. Note that charrays can have a length of zero only if at the end of a structure, implying there will be a buffer immediately following.	No
divisor	No	If specified, the the value of this field is divided by this to obtain a (floating point) number of units.	No
minval	No	The minimum valid value can be found in this field	No
maxval	No	The maximum valid value can be found in this field	No
clowval	No	The value below which caution should be exercised can be found in this field	No
chighval	No	The value above which caution should be exercised can be found in this field	No
units	No	What units (e.g. seconds, pounds, etc) is this field provided in? The units must exist in the param_units dictionary.	No
interpret	No	If specified, interpret this field using the given Dictionary	No
defrange	No	If specified, references a predefined range for interpretation of the value.	No

uint32 - 32-bit unsigned integer uint32

Attribute	Mandatory	Definition	Default
length	No	If specified, this field is actually an array of this length. Note that charrays can have a length of zero only if at the end of a structure, implying there will be a buffer immediately following.	No
divisor	No	If specified, the the value of this field is divided by this to obtain a (floating point) number of units.	No
minval	No	The minimum valid value can be found in this field	No
maxval	No	The maximum valid value can be found in this field	No
clowval	No	The value below which caution should be exercised can be found in this field	No
chighval	No	The value above which caution should be exercised can be found in this field	No
units	No	What units (e.g. seconds, pounds, etc) is this field provided in? The units must exist in the param_units dictionary.	No
interpret	No	If specified, interpret this field using the given Dictionary	No
defrange	No	If specified, references a predefined range for interpretation of the value.	No

charray - 8-bit ISO-8859 encoded character string, NUL (0) terminated charray

Attribute	Mandatory	Definition	Default
length	Yes	If specified, this field is actually an array of this length. Note that charrays can have a length of zero only if at the end of a structure, implying there will be a buffer immediately following.	No
name	Yes	Mandatory name for this parameter format which may only contain lower case letters a-z, underscore ('_') and digits 0-9 after the first non-digit character.	No
definition	No	Human readable description of the purpose of this item.	No

struct - A previously defined structure struct

Attribute	Mandatory	Definition	Default
struct	Yes		No
name	Yes	Mandatory name for this parameter format which may only contain lower case letters a-z, underscore ('_') and digits 0-9 after the first non-digit character.	No
definition	No	Human readable description of the purpose of this item.	No

starray - Array of another previously defined structure starray

Attribute	Mandatory	Definition	Default
struct	Yes	If specified, references a predefined range for interpretation of the value.	No
length	Yes	If specified, this field is actually an array of this length. Note that charrays can have a length of zero only if at the end of a structure, implying there will be a buffer immediately following.	No
name	Yes	Mandatory name for this parameter format which may only contain lower case letters a-z, underscore ('_') and digits 0-9 after the first non-digit character.	No
definition	No	Human readable description of the purpose of this item.	No

paramformat paramformat

Attribute	Mandatory	Definition	Default
value	Yes	This is the integer ID that is used to uniquely identify a parameter format	No
bufferlen	No	For parameter formats which end in a charray of length zero, this is the maximum number of character bytes that any parameter could contain.	No
minval	No	The minimum valid value can be found in this field	No
maxval	No	The maximum valid value can be found in this field	No
clowval	No	The value below which caution should be exercised can be found in this attribute	No
chighval	No	The value below which caution should be exercised can be found in this attribute	No
name	Yes	Mandatory name for this parameter format which may only contain lower case letters a-z, underscore ('_') and digits 0-9 after the first non-digit character.	No
definition	No	Human readable description of the purpose of this item.	No

dictionaries

dictionary dictionary

Attribute	Mandatory	Definition	Default
default	No	If specified, use this name for any value that is not defined in the dictionary. If unspecified, "UNKNOWN" is used.	UNKNOWN
emptyok	No	If set to "true", an empty string is considered an encoding of zero rather than an error and a zero value is an empty name unless zero is otherwise defined.	false
issigned	No	If set to "true", all value fields for dictionary entries are considered to be 32-bit signed integers. Otherwise all dictionary entry values are considered 32-bit unsigned integers.	false
mask	No	If defined, this integer is used as a default mask for the interpretation of non-flag values.	No
numbersok	No	If set to true, bare numbers that do not have named values are permissible.	FALSE
immutable	No	If set to true, this dictionary may not be modified by a future dictionary load.	false
separator	No	If defined, this integer is used as a default mask for the interpretation of non-flag values.	|
class	No	For dictionaries of message subclasses, this specifies the msgcl field from the msg_class dictionary for which this set of subclasses applies	No
minval	No	The minimum valid value for the dictionary if set (otherwise all possible values of the underlying datatype are assumed valid).	No
maxval	No	The minimum valid value for the dictionary if set (otherwise all possible values of the underlying datatype are assumed valid).	No
type	No	Marked external to indicate that there is implementation needed to perform the translation.	No
name	Yes	Mandatory name for this parameter format which may only contain lower case letters a-z, underscore ('_') and digits 0-9 after the first non-digit character.	No
definition	No	Human readable description of the purpose of this item.	No

entry entry

Attribute	Mandatory	Definition	Default
value	Yes	Mandatory unique value in the form of a signed or unsigned 32-bit number which may be specified with an optional shift left and in parenthesis.	No
format	No	Required for the db_param dictionary to indicate what the param_format of the parameter is.	No
interpret	No	For the db_param if specified, interpret the given database parameter using the specified dictionary.	No
units	No	For db_param if specified, the units of measure for the given database parameter	No
divisor	No	For db_param if specified, the value should be divided by this number to determine the (floating point) number of units.	No
flag	No	If specified with a value of "true", the value is treated as a flag that is combined with other values. Any value formed with a shift is assumed to be a flag by default.	false
mask	No	If specified, this 32-bit mask is applied to the value before comparison with the given value.	false
body	No	For Maintenance Messages specifies the `structure` associated with the body of this maintenance message.	false
a661encoding	No	Used for ARINC-661 parameters in A661 dictionaries as a hint to how the data is encoded for ARINC-661.	false
name	Yes	Mandatory name for this parameter format which may only contain lower case letters a-z, underscore ('_') and digits 0-9 after the first non-digit character.	No
definition	No	Human readable description of the purpose of this item.	No

ranges

range range

Attribute	Mandatory	Definition	Default
minval	Yes	The minimum value for the range.	No
maxval	Yes	The maximum value that the range can have.	No
mindisp	Yes	The minimum value when displaying a value interpreted with the range versus the minimum value that the range can have.	No
maxdisp	Yes	The maximum value when displaying a value interpreted with the range versus the maximum value that the range parameter can have.	No
divisor	No	For a range the value to divide the ranged parameter by prior to interpreting the value.	No
wrap	No	A Boolean flag where true indicates that values greater than the maxval of the range should wrap circularly starting at the minval of the range.	No
numticks	No	How many subdivisions of the range there should be (i.e. the number of tick marks to make in a gauge).	No
name	Yes	Mandatory name for this parameter format which may only contain lower case letters a-z, underscore ('_') and digits 0-9 after the first non-digit character.	No
definition	No	Human readable description of the purpose of this item.	No

tick tick

Attribute	Mandatory	Definition	Default
color	Yes	The specific color to display at the specified value.	No
value	Yes	The specific value at which a specified color should be displayed.	No

params

param param

Attribute	Mandatory	Definition	Default
value	Yes	This is the 21-bit identifier field that will be have the length in 11-bits prepended to form the total parameter identifier.	No
format	Yes	What the parameter format special structure describes how to interpret the data.	No
units	No	What units (i.e. lbs, degrees Fahrenheit, or Knots) the value is given in specified in a special param_units dictionary.	No
defrange	No	The default range to be used to determine if the parameter is valid when examined.	No
divisor	No	The divisor that is applied to the value of this parameter before it is sent as an XSEDE message.	No
length	No	For variable length parameter formats, what the length of the variable portion is in Bytes.	No
interpret	No	Default dictionary to be used to interpret the value of the parameter.	No
range	No	Boolean value that is used to signal that a range parameter should be generated in conjunction with the default non-range parameter.	No
unitnum	No	A human readable interpretation for what a unit number means for the parameter. For example, a parameter for the source of music in an airplane might explain the unit number is representative of which audio panel in the aircraft.	No
subunitnum	No	A human readable interpretation for what a subunit number means for the parameter. For example, a parameter for the source of music in an airplane might explain the standard mapping of the subunit number to crew, passengers, or the audio panel as a whole.	No
name	Yes	Mandatory name for this parameter format which may only contain lower case letters a-z, underscore ('_') and digits 0-9 after the first non-digit character.	No
definition	No	Human readable description of the purpose of this item.	No

Message Format

Message Header

Message Header Format 1 2 3 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | src id | message number | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | msg class | message ID | flags | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | tcid | len | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | | ... : Data : ... | | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+

XSEDE messages are formatted as shown in the above diagram and consist of the following fields:

src id:

UINT16; locally configured source ID. Must be unique on network.

message number:

UINT16; monotonically increasing message number.

msg class:

UINT8; The message class. See

message ID:

UINT8; msg-op; See .

flags:

UINT16; See .

tcid:

t-NONE; See .

len:

UINT16 ; length of all parameters or raw data in octets. Note: Operational and Maintenance class messages shall always have a length that is a factor or 4.

data:

1*(parameter) / *(OCTET) ; raw data may be arbitrary length sequence of octets.

Message Header Dictionaries This section defines the dictionaries used in the message header. See . , below, shows the values defined in the msg-class Dictionary. These options represent the XFS common data bus message classes. msg-class Dictionary

Name	Value	Definition
MAINT	%d2	Maintenance Message
OP	%d3	Operational Message
RAW	%d4	Access to raw data stream (e.g. RS-232, RS-485, ARINC-429, etc)

, below, shows the values defined in the msg-maint Dictionary. These options represent the Message subclasses for maintenance message class. msg-maint Dictionary

Name	Value	Definition
MXREQ	%d1	Request maintenance mode for a specific CPU (or all if cpu is empty)
MXCHAL	%d2	Authentication challenge
MXAUTH	%d3	Authentication response
MXACCEPT	%d4	Accept authentication request
MXDENY	%d5	Deny maintenance mode
MXREADY	%d6	Ready for update or diagnostic
DOUPDATE	%d7	User Requests System Update. Note CPU is requestor
UPDREQ	%d8	Request Update for given Device
UPDSTAT	%d9	Status of Update
DODIAG	%d10	User Requests System Update. Note CPU is requestor. Salt is type of diagnostic.
DIAGREQ	%d11	Request diagnostic for given Device.
DIAGSTAT	%d12	Status of Update

, below, shows the values defined in the msg-op Dictionary. These options represent the Message subclasses for operational message class. msg-op Dictionary

Name	Value	Definition
SUBFLDATA	%d1	Subscribe to Aircraft Flight Data Params
FLIGHTDATA	%d2	Flight Data Info
DEVSTATUS	%d3	Device Status
GDL90	%d4	GDL-90 Format Messages without framing, FCS or escape characters
SUBMSGCLID	%d5	Subscribe to Specific Message Class and ID

, below, shows the values defined in the msg-raw Dictionary. These options represent the Message subclasses for raw message class. msg-raw Dictionary

Name	Value	Definition
SERIALRX	%d1	Serial raw data stream receive from end device
SERIALTX	%d2	Serial raw data stream transmit to end device
SPIRX	%d5	Raw SPI bus receive from end device
SPITX	%d6	Raw SPI bus transmit to end device
ARINC429RX	%d7	Raw ARINC-429 bus receive from end device
ARINC429TX	%d8	Raw ARINC-429 bus transmit to end device
MIL1553RX	%d9	Raw MIL-STD-1553 received from end device
MIL1553TX	%d10	Raw MIL-STD-1553 bus transmit to end device
ECBRX	%d11	Raw XFS ECB control receive from end device
ECBTX	%d12	Raw XFS ECB control transmit to end device
GPIORX	%d13	Raw XFS ECB control receive from end device
GPIOTX	%d14	Raw XFS ECB control transmit to end device
ADCRX	%d15	Analog/Digital Converter receive from end device
DACTX	%d16	Digital/Analog Converter transmit to end device
CANBUSRX	%d17	Raw CAN bus receive from end device
CANBUSTX	%d18	Raw CAN bus transmit to end device
DATAGRAMRX	%d19	Raw Datagram receive from end device
DATAGRAMTX	%d20	Raw Datagram transmit to end device

, below, shows the values defined in the msg-flag-cert Dictionary. These options represent the Message and parameter certification level tracking. msg-flag-cert Dictionary

Name	Value	Definition
EXPERIMENTAL	%d0	Experimental
LEVEL-E	%d1	DO-178 Level E
LEVEL-D	%d2	DO-178 Level D
LEVEL-C	%d3	DO-178 Level C
LEVEL-B	%d4	DO-178 Level B
LEVEL-A	%d5	DO-178 Level A

, below, shows the values defined in the tcid Dictionary. These options represent the XFS transcoder ID values. tcid Dictionary

Name	Value	Definition
NONE	%d0	No transcoder ID is required or asserted
DEFAULT	%d65536	Pseudo-value to represent global default

Message Parameter Format The section defines the elements common to all XSEDE parameters.

Message Parameter Format 1 2 3 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Unit | SubUnit | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Parameter Data Len | Ident | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Format | Confidence | Expire | Pflags | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | | ... : Parameter Data : ... | | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+

Unit:

UINT16 If appropriate, which unit this parameter applies (e.g., Engine #1).

SubUnit:

UINT16; If appropriate, which subunit this parameter applies (e.g., Engine #2, Cylinder #3).

Parameter Ident:

UINT32; This attribute is the composite of the length and a parameter specific identifier. Nodes MUST compare this value as a whole to their known parameters; that is to say, an Ident with a different length is a different parameter. This same Ident with a different length situation commonly occurs when sending range parameters but it also can happen when parameter definitions are updated. If the combined value does not match a known parameter/length pair, the parameter data length MUST be determined, then padded to a multiple of four, and the parameter MUST be ignored.

Len:

11 bits; Parameter Data Length in octets. This value MUST reflect the usable length of the parameter data, not including padding, however, the parameter itself MUST be padded to a length that is a multiple of four octets to maintain proper word alignment.

Ident:

21 bits; XSEDE Parameter Identifier. See .

Format:

param_format (OCTET): Format of Parameter Data. See .

Confidence:

param_confidence (OCTET): Confidence of data element. See .

Expire:

OCTET; Time to live. %x00 to not expire. See for encoding.

Pflags:

msg_flag_cert(OCTET) Reserved Flags, bottom three bits are certification level of data. See

Parameter Data:

*(OCTET) quadword padded payload.

Parameter Header Dictionaries , below, shows the values defined in the param-confidence Dictionary. These options represent the XFS common bus parameter format confidence levels. param-confidence Dictionary

Name	Value	Definition
HIGH	%d100	Confirmed known value
USERSEL	%d90	User selected value at runtime
SYSSEL	%d80	System selected value at runtime
INTENTSEL	%d70	User has indicated intent to make a change for this value, but it has not yet been confirmed
UNANIMOUS	%d50	Redundant data available and is rationalized
RATIONAL	%d40	Data being rationalized from other data sources with normal sources ignored
VOTED	%d30	Data is redundantly verified from identical instruments
SMOOTHED	%d20	Smoothed/filtered version of raw data
RAW	%d10	Raw, unchecked data
ESTIMATE	%d5	Rough estimation
USELESS	%d0	Value is missing or expected invalid and supplied for debugging ONLY

The msg_flag_cert Dictionary is also used. See for its definition.

Expire Encoding Information provided in messages have a limited usability lifetime or time-to-live. The Expire field is used to indicate how long the associated parameter is valid. It is an eight-bit field that is split into an exponent and mantissa to provide the maximum range and precision within this small space. The upper four bits represent the the mantissa and the lower four bits represent the exponent. If the value of the Expire field is %x00, the value MUST be interpreted to mean "the parameter does not expire," otherwise the expiry time value MUST be determined by the following formula: Expiration (milliseconds) = (16 + M) * 2^E which can be implemented with ( 0x10 | M ) << E This approach give us the range of 17 to 1015880 milliseconds (about 17 minutes) with 0x00 reserved as "No Expiration."

Message Parameter Format 0 0 1 2 3 4 5 6 7 +-+-+-+-+-+-+-+-+ | E | M | +-+-+-+-+-+-+-+-+

For example, an expiry value of %x31 gives a mantissa of 0001 and an exponent of 0011 yielding a value of (16 + 1) * 2^E ms or 128 milliseconds. Another example, a value of %x7F which decomposes to a mantissa of 1111 and an exponent of 0111 yielding a value of (16 + 15) * 2^7 ms, or 3968 milliseconds. The minimum value of %x01 which decomposes to a mantissa of 0001 and an exponent of 0000 yielding a value of (16 + 1) * 2^0 ms, or 17 milliseconds. The maximum value of %xFF which decomposes to a mantissa of 1111 and an exponent of 1111 yielding a value of (16 + 15) * 2^15 ms, or 1015808 milliseconds, which is about 17 minutes. A final example, %x00 which is a special case for "No Expiration."

Parameter Attribute Formats The various attributes associated with parameters occur as both simple types, such as Integers and compound structures, such as Waypoints. This section defines the attribute formats that are used in XSEDE.

BOOL Parameter Format Boolean Format Parameter Identifier: %d1 Length: 4 Structure: BOOL Parameter Format

Item	Type	Description
bool-value	boolean	Zero for false, 1 for true, all others undefined

, below, shows the values defined in the boolean Dictionary. These options represent the Nominal boolean values. boolean Dictionary

Name	Value	Definition
FALSE	%d0	False
TRUE	%d1	True

UINT Parameter Format Unsigned 32-bit Integer Format Parameter Identifier: %d2 Length: 4 Structure: UINT Parameter Format

Item	Type	Description
uint-value	uint32	32-bit Unsigned Value

WAYPOINT Parameter Format Waypoint on a Flight Plan Parameter Identifier: %d3 Length: 80 Structure: WAYPOINT Parameter Format

Item	Type	Description
label	12*12(OCTET)	Name of waypoint
lat	int32	Latitude of waypoint * 10,000,000
lon	int32	Longitude of waypoint * 10,000,000
lonlen	int32	Length of degree of longitude for this lattitude in meters
alt	int32	Altitude associated with waypoint in 0.1ft
minalt	int32	Logical Minimum for Fix Crossing in 0.1ft
maxalt	int32	Logical Maximum Altitude for Fix Crossing in 0.1ft
speed	int32	Target indicated airspeed
magadj	uint32	Original (VOR) or Current (GPS) Magnetic Deviation in 0.01 degrees of NAVAID
inbound	uint16	Inbound course in 0.01 degrees
outbound	uint16	Outbound course in 0.01 degrees
freq	uint32	Frequency if this is a NAV AID
wtype	fms-waypoint	Type of waypoint
ctype	fms-container	Type of container
flags	fms-flag	Flags for the waypoint / leg
cumete	uint32	Cumulative ETE from active waypoint in 0.01 seconds
cumdis	uint32	Cumulative distance from active waypoint in 0.001 nm
container	16*16(OCTET)	What container is this waypoint a part of (e.g. V431, ILS-18L, etc)

, below, shows the values defined in the fms-waypoint Dictionary. These options represent the Flight management system waypoint types. fms-waypoint Dictionary

Name	Value	Definition
UNKNOWN	%d0	Unknown or unspecified
GS	%x80	Glideslope component
DME	%x40	DME Component
TACAN	%x20	TACAN Component
VOR	%d1	VOR Component
LOC	%d2	Localizer component
NDB	%d3	NDB component
LDA	%d4	LDA Component
SDF	%d5	SDF Component
FIX	%d6	Generic RNAV Fix
ILS	%d7	Complete ILS system
AIRPORT	%d8	An Airport
DIRECTFROM	%d9	Starting point of a direct to
WEATHER	%d10	Weather reporting station only

, below, shows the values defined in the fms-container Dictionary. These options represent the Flight management system container types. fms-container Dictionary

Name	Value	Definition
UNKNOWN	%d0	Unspecified or unknown container
NONE	%d1	No container
VICTOR	%d2	VOR Airway
JET	%d3	Jet Airway
AMBER	%d4	Amber Airway
BLUE	%d5	Blue Airway
GREEN	%d6	Green Airway
RED	%d7	Red Airway
Q	%d8	RNAV Q Routes
T	%d9	RNAV T Routes
STAR	%d10	Standard Arrival Procedure
DP	%d11	Standard Departure Procedure
APP	%d12	Instrument Approach
RWY	%d13	Airport Runway Surface Selection

, below, shows the values defined in the fms-flag Dictionary. These options represent the Flight management system waypoint and leg flags. fms-flag Dictionary

Name	Value	Definition
NONE	%d0	No flags or leg type known
LEGTYPE-VA	%d1	Heading to Altitude
LEGTYPE-VD	%d2	Heading to DME Distance
LEGTYPE-VI	%d3	Heading to Next Leg Intercept
LEGTYPE-VM	%d4	Heading to Manual Termination
LEGTYPE-VR	%d5	Heading to Radial Termination
LEGTYPE-CA	%d6	Course to an Altitude
LEGTYPE-CD	%d7	Course to a DME Distance
LEGTYPE-CI	%d8	Course to Next Leg Intercept
LEGTYPE-CR	%d9	Course to Radial Termination
LEGTYPE-CF	%d10	Course to a Fix
LEGTYPE-TF	%d11	Tracking Between Two Fixes
LEGTYPE-DF	%d12	Direct to a Fix
LEGTYPE-FA	%d13	Course from a Fix to an Altitude
LEGTYPE-FC	%d14	Course from a Fix to an Along Track Distance
LEGTYPE-FD	%d15	Course from a Fix to a DME Distance
LEGTYPE-FM	%d16	Course from a Fix to a Manual Termination
LEGTYPE-AF	%d17	Constant DMA Arc to a Fix
LEGTYPE-HF	%d18	Hold to a Fix
LEGTYPE-HA	%d19	Hold to an Altitude
LEGTYPE-HM	%d20	Hold to a Manual Termination
LEGTYPE-IF	%d21	Initial Fix
LEGTYPE-PI	%d22	Procedure Turn to Intercept
LEGTYPE-RF	%d23	Radius to a Fix
LEGTYPE-MASK	%xff	Mask with which to retrieve leg type
FLYOVER	%x01.00	If not present, fly by
DISC	%x02.00	If present, Discontinuity before current waypoint
ACTIVE	%x04.00	If present, this is the active waypoint
OBS	%x08.00	If present, waypoint allows OBS to be set
FAF	%x10.00	If present, waypoint is final approach fix or after
SUSPEND	%x20.00	FMS sequencing is suspended at this waypoint
LAST	%x40.00	This waypoint is the last one in the flight plan

STRING Parameter Format String of characters (may not have NULL termination) Parameter Identifier: %d4 Length: length(data) + 0 Structure: STRING Parameter Format

Item	Type	Description
string-value	*(OCTET)	Optionally NUL terminated ISO-8559-1 String

CASMSG Parameter Format CAS Message Parameter Identifier: %d5 Length: length(data) + 4 Structure: CASMSG Parameter Format

Item	Type	Description
level	cas-msglvl	CAS level
rsvd	uint8	Reserved, set to 0
flags	cas-msgflag	CAS related flags
label	*(OCTET)	Label for CAS Message

, below, shows the values defined in the cas-msglvl Dictionary. These options represent the Message levels for CAS messages and checklist items. cas-msglvl Dictionary

Name	Value	Definition
CLEAR	%d0	Clear a previously issued CAS message -- issue from system only
DEBUG	%d1	In-system debugging output only
LOG	%d2	Log to system log, but do not display
MAINT	%d3	Display only for maintenance purposes
STATUS	%d4	Aircraft system status only
ADVISORY	%d5	Advisory, flight crew should be aware, may require later crew response
CAUTION	%d6	Caution, requires immediate flight crew awareness and later response
WARNING	%d7	Warning, requires immediate awareness and response.
COMMENT	%d10	Checklist Comment Associated with Previous Item
UNCHKITEM	%d11	Unchecked Checklist Item
CHKITEM	%d12	Checked Checklist Item
CHKBRANCH	%d13	Checklist Branch Choice
PASS	%d14	Built-in Test (BIT) Item passed
INPROG	%d15	Built-in Test (BIT) Item in progress
NOTREQST	%d16	Built-in Test (BIT) Item not yet requested
INCOMPLT	%d17	Built-in Test (BIT) Item test did not complete
FAIL	%d18	Built-in Test (BIT) Item failed

, below, shows the values defined in the cas-msgflag Dictionary. These options represent the Additional flags associated with CAS messages. cas-msgflag Dictionary

Name	Value	Definition
NONE	%d0	No additional flags
AUTO	%x01	Item is automatically checked/unchecked or the test is automatically executed

NULL Parameter Format NULL format Parameter Identifier: %d7

SINT Parameter Format Signed 32-bit Integer Format Parameter Identifier: %d9 Length: 4 Structure: SINT Parameter Format

Item	Type	Description
sint-value	int32	Signed 32-bit two's complement value

BUS Parameter Format Bus and Electronic Circuit Breaker Format Parameter Identifier: %d10 Length: length(data) + 24 Structure: BUS Parameter Format

Item	Type	Description
state	ecb-state	State of Bus (in terms of ECB)
ecbflags	ecb-flag	Flags regarding ECB state
involts	int16	Input Volts on Bus
drawamps	int16	Current draw on bus
maxamps	int16	Max Amps on bus
champs	int16	Caution high amps
clamps	int16	Caution low amps
minamps	int16	Minimum amps on bus (could be -)
outvolts	int16	Output Volts on Bus
maxvolts	int16	Max volts
chvolts	int16	Caution high voltage
clvolts	int16	Caution low voltage
minvolts	int16	Minimum low voltage
label	*(OCTET)	Label for BUS Message (System/Item)

, below, shows the values defined in the ecb-state Dictionary. These options represent the Electronic circuit breaker status. ecb-state Dictionary

Name	Value	Definition
UNKNOWN	%d0	Circuit is in an unknown condition
OFF	%d1	Circuit is turned off
ON	%d2	Circuit is turned on
UNDERCUR	%d3	Circuit is on, <100ma current drawn
RESET	%d4	Request Reset
FORWARD	%d5	ECB is active logical FWD direction
REVERSE	%d6	ECB is active logical REV direction
TARGET	%d7	ECB is set by target, not ON/OFF
BRAKELOW	%d8	ECB is set by target, not ON/OFF
SHORTED	%d128	Short Circuit
OVERCUR	%d129	Overcurrent (but not short circuit)
OVERVOL	%d130	Overvoltage situation
DISABLED	%d131	Disabled by state-fault
RUNAWAY	%d132	Disabled due to runaway (trim/flaps)
COLLARED	%d133	Should not reset in flight
JAMMED	%d134	Mechanical Jam detected
PULLED	%d135	Pulled
BACKFLOW	%d136	Disabled due to reverse current flow

, below, shows the values defined in the ecb-flag Dictionary. These options represent the Electronic circuit breaker parameter flags. ecb-flag Dictionary

Name	Value	Definition
INPUTVOLTS	%x01	Input Volts field is valid

RANGE Parameter Format Range description format Parameter Identifier: %d11 Length: 36 Structure: RANGE Parameter Format

Item	Type	Description
numticks	uint16	How many ticks are there
dispunits	param-units	Specifier for units for display
minval	int32	Minimum valid value
maxval	int32	Maximum valid value
mindisp	int32	Where display starts (values lower than this are clipped)
maxdisp	int32	Where display stops (values higher tha this are clipped)
ticks	starray	Actual tick data

, below, shows the values defined in the param-units Dictionary. These options represent the Units for the encoding and translation of XFS parameters. param-units Dictionary

Name	Value	Definition
UNSPEC	%x00	Units not specified
INHG	%x00.01	Use inches of Hg for BARO/MANPRES
FT	%x00.02	Use feet for altitude
NM	%x00.03	Use nautical miles for distance
C	%x00.04	Use celcius for temperature
LBFT	%x00.05	Use pound-feet for torque
S	%x00.06	Use seconds for time
A	%x00.07	Use amps for current
V	%x00.08	Use volts for voltage
LB	%x00.09	Use pounds for weight
IN	%x00.0a	Use inches for distance
FPM	%x00.0b	Use feet per minute for rate of climb/descent
LBPH	%x00.0c	Pounds per Hour for fuel flow
DEGPS	%x00.0d	Degrees per second for attitude change
DEG	%x00.0e	Degrees for attitude
G	%x00.0f	G force for load
RGBA	%x00.10	8888 RGBA Value
MHZ	%x00.11	Megahertz for Frequency
PCENT	%x00.12	Percent of Maximum
KT	%x00.13	Knots for Speed
NMPLB	%x00.14	Nautical Miles per Pound
KTPS	%x00.15	Knots per second
MACH	%x00.16	Speed of sound
CPM	%x00.17	Count per minute
PPM	%x00.18	Parts per million
LPM	%x00.19	Liters Per Minute
KW	%x00.1a	Kilowatt
AH	%x00.1b	Amp Hour
GAL	%x00.1c	Gallons of volume
NMPGAL	%x00.1d	Nautical Miles per Gallon
GPH	%x00.1e	Gallons per Hour for fuel flow
MEMS	%x00.1f	Mantissa/Exponent Milliseconds (2^E)*(M+16)
HPA	%x80.01	Use Hecto pascals for BARO
M	%x80.02	Use meters for altitude
SM	%x80.03	Use statute miles for distance
F	%x80.04	Use fahrenheit for temperature
NWM	%x80.05	Use Newton Meters for torque
PSI	%x80.06	Use PSI for MANPRES
MPH	%x80.07	Use miles per hour for speed
SMPLB	%x80.08	Statute Miles per Pound
MIN	%x80.09	Minutes
HR	%x80.0a	Hours
HP	%x80.0b	Use Horsepower for power
KG	%x80.0c	Use kilograms at earth gravity for weight
L	%x80.1c	Liters of volume
LPH	%x00.1e	Liters per Hour for fuel flow
UL	%xff.ff	Unitless

GPIO Parameter Format GPIO summary format Parameter Identifier: %d12 Length: 12 Structure: GPIO Parameter Format

Item	Type	Description
features	uint32	4-bit Feature (XFS_GPIO_FEATURE_*) x 8
outmodes	uint32	4-bit Output modes (XFS_GPIO_OUTPUT_*) x 8
inmodes	uint16	2-bit Input modes (XFS_GPIO_INPUT_*) x 8
flags	uint16	Reserved for future use

APP Parameter Format APP status format Parameter Identifier: %d13 Length: length(data) + 52 Structure: APP Parameter Format

Item	Type	Description
state	scb-state	State of application*
rsvd	uint8	Reserved bits
appflags	scb-flag	Flags regarding app
avgcpu	uint16	Average OS CPU time utilization (of allocated amount) over last second (0=unknown, 1=minimal, 65535=all)
hwcpu	uint16	High water OS CPU time utilization (of allocated amount, 0=unknown, 1=minimal, 65535=all)
stackused	uint16	Portion of stack used (0=unknown, 1=minimal, 65535=all)
heapused	uint16	Portion of heap used (0=unknown, 1=minimal, 65535=all)
netused	uint16	Portion of network used (0=unknown, 1=minimal, 65535=all)
otherused	uint16	Worst case portion of any other limited resources (0=unknown, 1=minimal, 65535=all)
ivcsw	uint32	Involuntary context switches
aircraftid	16*16(OCTET)	Aircraft Identifier
swrev	16*16(OCTET)	Software Version Identifier
label	*(OCTET)	Name of APP

, below, shows the values defined in the scb-state Dictionary. These options represent the Software circuit breaker states. scb-state Dictionary

Name	Value	Definition
UNKNOWN	%d0	State of software is unknown
STARTING	%d1	Application is in startup phase
RUNNING	%d2	Application is running
STOPPING	%d3	Stopping has been requested
RESTART	%d4	Restart Application (PULL + RESET + START)
RESET	%d5	Allow application to be started
HUNG	%d6	Application is running but is no longer responsive
DEGRADED	%d127	Application is running in a degraded mode
STOPPED	%d128	Application is stopped
STARTFAIL	%d129	Application failed startup
RUNAWAY	%d130	Application has a runaway loop
OVERCPU	%d131	Application is using excessive CPU while in RUNNING state
OVERMEM	%d132	Application terminated due to memory overrun
EXCEPTION	%d133	Application terminated due to runtime exception
ENDED	%d134	Application ended without error or request
ENDERROR	%d135	Application ended with error condition
PULLED	%d136	Application should not be allowed to run until reset
COLLARED	%d137	Should not reset in flight

, below, shows the values defined in the scb-flag Dictionary. These options represent the Software Circuit Breaker Flags. scb-flag Dictionary

Name	Value	Definition
NONE	%d0	Application running within normal paramters
HIGHMEM	%x01	Application has used unexpectedly high portion of memory
HIGHCPU	%x02	Application has used unexpectedly high portion of CPU
HIGHBW	%x04	Application has used unexpectedly high portion of network bandwidth

UPDATE Parameter Format Aircraft Update Progress Parameter Identifier: %d15 Length: length(data) + 56 Structure: UPDATE Parameter Format

Item	Type	Description
aircraftid	16*16(OCTET)	Aircraft Identifier
progress	uint32	Progress
progflags	msg-cmd-updstat-flag	Progress Flags
activity	32*32(OCTET)	Description of current activity
label	*(OCTET)	Name of CPU being updated

, below, shows the values defined in the msg-cmd-updstat-flag Dictionary. These options represent the Maintenance mode status update flags. msg-cmd-updstat-flag Dictionary

Name	Value	Definition
SUCCESS	%x01	Update is complete and successful
ERROR	%x02	Error during update

SERVO Parameter Format Position with flags to interpret whether servo should be engaged, disengaged or left alone and whether active Parameter Identifier: %d16 Length: 8 Structure: SERVO Parameter Format

Item	Type	Description
servopos	int32	None
servomode	afcs-servo	None

, below, shows the values defined in the afcs-servo Dictionary. These options represent the Servo engagement flags. afcs-servo Dictionary

Name	Value	Definition
ENGAGE	%x80.00.00.00	If present in engagement request, along with 'ENGAGED' value, set engagment status
ENGAGED	%d1	For requests, retain current engagement state, for status, present if currently engaged
DISENGAGED	%d0	If engaged, disengage and for status, currently disengaged

DBASE Parameter Format Database Information Parameter Identifier: %d17 Length: 92 Structure: DBASE Parameter Format

Item	Type	Description
crc	uint32	32-bit CRC of database file
name	16*16(OCTET)	Name of database (e.g. com)
supplier	16*16(OCTET)	Who supplied the database
region	16*16(OCTET)	What region is the data valid for
cycle	16*16(OCTET)	What cycle
valid	12*12(OCTET)	What data begins data validity YYYY-MM-DD
expires	12*12(OCTET)	After which data is data expired YYYY-MM-DD

DATETIME Parameter Format Date and Time with internal values normalized to be consistent Parameter Identifier: %d18 Length: 20 Structure: DATETIME Parameter Format

Item	Type	Description
epochsec	uint32	Number of seconds since the epoch of Jan 1, 2025 or zero for dates predating the epoch, without consideration of leap seconds
timems	uint32	Number of milliseconds since midnight
flags	uint16	Reserved time-related Flags
year	int16	Year
yday	uint16	Day of year beginning with 1
mon	month	Month of year
mday	uint8	Day of month beginning with 1
wday	weekday	Day of week
hour	uint8	Number of whole hours since midnight
min	uint8	Number of whole minutes past the most recent whole hour
sec	uint8	Number of whole seconds past the most recent whole minute with 60 used for a leap second

, below, shows the values defined in the month Dictionary. These options represent the Months of the year. month Dictionary

Name	Value	Definition
JAN	%d0	January
FEB	%d1	February
MAR	%d2	March
APR	%d3	April
MAY	%d4	May
JUN	%d5	June
JUL	%d6	July
AUG	%d7	August
SEP	%d8	September
OCT	%d9	October
NOV	%d10	November
DEC	%d11	December

, below, shows the values defined in the weekday Dictionary. These options represent the Days of the week. weekday Dictionary

Name	Value	Definition
SUN	%d0	Sunday
MON	%d1	Monday
TUE	%d2	Tuesday
WED	%d3	Wednesday
THU	%d4	Thursday
FRI	%d5	Friday
SAT	%d6	Saturday

Native Structures

Structures This section defines the default structures that are used for translating between XSEDE and other protocol interfaces.

config-entry-hdr-structure

• rlen(2 bytes): Record Length
• flags(2 bytes): Record Flags
• dtype(2 bytes): Data Type

msg-cmd-mxreq-structure

• cpu(32 bytes): CPU for which maintenance mode is being requested
• aircraftid(16 bytes): Aircraft ID for which MX mode is being requested

msg-cmd-updreq-structure

• cpu(32 bytes): CPU for which maintenance mode is being requested
• aircraftid(16 bytes): Aircraft ID for which MX mode is being requested
• tftpserver(4 bytes): TFTP Server IP Address

msg-cmd-diagreq-structure

• cpu(32 bytes): CPU for which maintenance mode is being requested
• aircraftid(16 bytes): Aircraft ID for which MX mode is being requested
• tftpserver(4 bytes): TFTP Server IP Address for results
• diag(32 bytes): Requested Diagnostic Name

msg-cmd-mxchal-structure

• cpu(32 bytes): CPU for which maintenance mode authentication is being requested
• aircraftid(16 bytes): Aircraft ID for which MX mode is being requested
• salt(32 bytes): Salt which must be signed

msg-cmd-mxauth-structure

• cpu(32 bytes): CPU for which maintenance mode authentication is being requested
• aircraftid(16 bytes): Aircraft ID for which MX mode is being requested
• salt(32 bytes): Salt which must be signed
• sig(64 bytes): Signed SHA1 signature of cpu ^ salt ^ aircraftid

msg-cmd-updstat-structure

• cpu(32 bytes): CPU for which maintenance mode is being requested
• aircraftid(16 bytes): Aircraft ID for which MX mode is being requested
• activity(32 bytes): Description of current activity
• progress(4 bytes): Progress in 1/1000 of one percent
• progflags(4 bytes): Flags for progress status

msg-sub-msg-structure

• mclass(1 bytes): Message Class
• mclid(1 bytes): Class Specific Message ID (or 0 for any message id for the given class)
• rsvd(2 bytes): Reserved for future use

suip-frame-structure

• cmd(2 bytes): Command
• addr(2 bytes): Peripheral Address
• data(variable-size bytes): Data

cantun-rxdata-structure

• seqno(2 bytes): None
• data(1 bytes): None

cantun-txstatus-structure

• flags(2 bytes): None

cantun-rxstatus-structure

• rxseqno(2 bytes): Last Received sequence number (0-16383), if high bit is 1, message is from perspective of CPU
• txseqno(2 bytes): Next to transmit sequence number (0-16383)
• lastrx(2 bytes): Time since last received message (0-65535)
• rxmiss(2 bytes): Count of sequence mismatches (0-65535)

cantun-txdata-structure

• seqno(2 bytes): When transmitting, the top two bits are reserved for beginning and end bits to be sure whole messages are transferred
• data(1 bytes): None

cantun-txflags-health-structure

• seqno(2 bytes): None
• status(1 bytes): Aircraft Status
• data(1 bytes): None

cantun-rxflags-health-structure

• seqno(2 bytes): None
• volts(2 bytes): Input Voltage
• temp(1 bytes): Temperature in degrees C relative to -80C

cantun-rxflags-ecb-structure

• seqno(2 bytes): None
• volts(2 bytes): Volts on Bus in 0.1 volts
• drawamps(2 bytes): Current draw in 0.1 amps on bus
• state(1 bytes): Current state of ECB
• flags(1 bytes): Flags on ECB

cantun-rxstatus-ecb-structure

• nominalamps(2 bytes): Nominal Max Current draw in 0.1 amps on bus
• hardamps(2 bytes): Absolute Max Current draw in 0.1 amps on bus
• nominalrevamps(2 bytes): Nominal reverse max amps
• hardrevamps(2 bytes): Nominal reverse max amps

cantun-txflags-ecb-structure

• seqno(2 bytes): None
• nominalmaxamps(2 bytes): Nominal max amps
• hardmaxamps(2 bytes): Hard maximum Amps
• state(1 bytes): State
• flags(1 bytes): None

cantun-txdata-ecb-structure

• seqno(2 bytes): None
• posreq(2 bytes): Requested position (0-1000) top 6 bits reserved

cantun-rxdata-ecb-structure

• seqno(2 bytes): None
• posreq(2 bytes): Currently requested position (0-1000) top 6 bits reserved
• posact(2 bytes): Actual current position (0-1000) top 6 bits reserved

cantun-rxflags-gpio-structure

• seqno(2 bytes): None
• inputmodes(2 bytes): Detected input modes (XFS_GPIO_INPUT_*) (8 total)
• outputmodes(4 bytes): Each port output mode (XFS_GPIO_OUTPUT_*) (8 total)

cantun-txflags-gpio-structure

• seqno(2 bytes): None
• isanalog(1 bytes): Which ports we wish to receive analog values?
• isreset(1 bytes): Which ports should have faults reset
• outputmodes(4 bytes): Each port output mode (8 total)

cantun-rxdata-gpio-structure

• seqno(2 bytes): None
• rxdata(2 bytes): Recieved data - Bit 15 if last entry, bits 14-12 are pin # (0-7), bits 0-11 are value 0-4095, up to 3 entries

cantun-txdata-gpio-structure

• seqno(2 bytes): None
• txdata(2 bytes): Transmitted PWM/DAC value - Bit 15 reserved, bits 14-12 are pin # (0-7), bits 0-11 are value 0-4095, up to 3 entries

cantun-rxdata-ar429-structure

• seqno(2 bytes): None
• flags(2 bytes): Reserved
• arinc429(4 bytes): ARINC 429 Word

cantun-txdata-ar429-structure

• seqno(2 bytes): None
• flags(2 bytes): Reserved
• arinc429(4 bytes): ARINC 429 Word

cantun-rxflags-config-structure

• seqno(2 bytes): None
• cmd(1 bytes): None
• flags(1 bytes): None
• moduleid(4 bytes): Globally unique module ID

cantun-txflags-config-structure

• seqno(2 bytes): None
• cmd(1 bytes): None
• flags(1 bytes): None
• moduleid(4 bytes): Globally unique module ID

cantun-txdata-config-structure

• seqno(2 bytes): None
• data(6 bytes): For Console, commands to be issued to device. For Flash, actual flash data

cantun-rxdata-config-structure

• seqno(2 bytes): None
• data(6 bytes): For Console, output from device. For Flash, acknowledge receipt by seqno

ethertun-can-structure

• canid(4 bytes): CAN ID and related fields
• dlc(1 bytes): Length of data (0-8 bytes)
• srcbus(1 bytes): Globally Unique Source Bus Number
• seqno(2 bytes): Sequence Number 0 - 0x3fff
• data(8 bytes): Encapsulated CAN data

ethertun-arinc429-structure

• srcbus(1 bytes): Globally Unique Source Bus Number
• flags(1 bytes): Flags reserved for future use
• seqno(2 bytes): Sequence Number
• words(4 bytes): Encapsulated ARINC429 data

ethertun-serial-structure

• srcbus(1 bytes): Globally Unique Source Serial Bus Number
• flags(1 bytes): Flags reserved for future use
• seqno(2 bytes): Sequence Number 0 - 0x3fff
• data(variable-size bytes): Encapsulated Serial data

ethertun-gpio-structure

• seqno(2 bytes): Sequence number unique to source IP/PORT combo
• pinno(1 bytes): Pin Number
• outmode(1 bytes): Output modes (XFS_GPIO_OUTPUT_*)
• value(4 bytes): Analog or digital value

ethertun-ts-can-structure

• canid(4 bytes): CAN ID and related fields
• dlc(1 bytes): Length of data (0-8 bytes)
• srcbus(1 bytes): Globally Unique Source Bus Number
• seqno(2 bytes): Sequence Number
• origts(4 bytes): Original Relative Timestamp
• data(8 bytes): Encapsulated CAN data

milstd1553-etherhdr-structure

• flags(2 bytes): Reserved for flags
• seqno(2 bytes): Sequence number of 14 bits

milstd1553-hdr-structure

• flags(2 bytes): Frame Flags
• modecode(1 bytes): Class of message transaction
• wordcount(1 bytes): Number of actual words (0-32)
• rtaddr1(1 bytes): Remote Terminal Address (first cmd)
• subaddr1(1 bytes): Remote Terminal Function Subaddress (first cmd)
• status1(2 bytes): Remote Terminal Status (first cmd)
• rtaddr2(1 bytes): Remote Terminal Address (second cmd)
• subaddr2(1 bytes): Remote Terminal Function Subaddress (second cmd)
• status2(2 bytes): Remote Terminal Status (second cmd)
• data(2 bytes): 0-32 words of data

datagram-gpio-msg-structure

• value(4 bytes): Interpreted value of GPIO (e.g. DAC/ADC/PWM)
• outmodes(4 bytes): 4-bit Output modes (XFS_GPIO_OUTPUT_*) x 8
• inmodes(2 bytes): 2-bit Input modes (XFS_GPIO_INPUT_*) x 8

msg-structure

• srcaddr(2 bytes): Identifier of transmitting source, typically computer ID in upper 8 bits and microservice ID in lower 8 bits
• mseqno(2 bytes): Sequence number of message.
• mclass(1 bytes): Message Class
• mclid(1 bytes): Message ID
• flags(2 bytes): Message flags, bottom 3 bits reserved for cert level
• tcid(2 bytes): If multiple pathways exist for identical data, which pathway are we
• len(2 bytes): Length of message in bytes -- note that it could be shorter than available data due to alignment issues
• data(variable-size bytes): Data (typically PARAMs)

msg-log-hdr-structure

• relts(4 bytes): Relative timestamp since startup

qar-datagram-log-hdr-structure

• relts(4 bytes): Relative timestamp since startup
• flags(2 bytes): Reserved for potential future flags for packet
• length(2 bytes): Length of packets in bytes

param-common-structure

• unit(2 bytes): If appropriate, which unit this parameter applies to (e.g. Engine #1)
• subunit(2 bytes): If appropriate, which subunit this parameter applies to (e.g. Engine #2, Cylinder #3)
• ident(4 bytes): XFS Parameter Identifier
• format(1 bytes): Format of data element
• confidence(1 bytes): Confidence of data element
• ttl(1 bytes): Time to live in milliseconds encoded using the MEMS encoding
• pflags(1 bytes): Reserved Flags, bottom 3 bits are certification level of data

param-range-tick-structure

• flags(2 bytes): Flags if any
• color(2 bytes): See tick color definition
• value(4 bytes): Value *above* which the tick should apply (except blue)
• label(8 bytes): Name associated with label

Parameter Ranges All parameter attributes values are typed, but some are further constrained to certain ranges. The ranges may limit in both value and display purposes. The display 'ticks' can define various classifications such as a green, yellow, or red range. Furthermore, ranges can change over time. For instance, good oil pressure for a cold engine may be normally higher than that for a warm engine and a special parameter can be broadcast to indicate a range change. defines the RANGE parameter format. Parameters that have a default range have that range described in the next section. The default range will be displayed in tabular format. Many parameters have default and unchangeable ranges, while others have dynamic ranges. Parameters that have dynamic ranges use a parameter that only differs in the length portion of the Parameter Data Len & Ident attribute. and having a RANGE attribute as its payload. The receiving node MUST distinguish between the value and the range parameters by examining the length portion of the parameter's attribute. Should a parameter attribute value be outside the permitted range. the value MUST be ignored. In the style of the next section, a generic range parameter is defined below:

Sample Range Parameter

• Parameter ID: Same as main parameter.
• Unit Usage: Same as main parameter.
• SubUnit Usage: Same as main parameter.
• Length: RANGE Length - 24 decimal plus tick data length.
• Format: RANGE (See .)

Ranges This section defines the default attribute ranges that are used in XSEDE.

SERVO Range Default

• Minimum Value: -100000
• Maximum Value: 100000
• Minimum Display Value: -100000
• Maximum Display Value: 100000
• Divisor: 1000

ROLL Range Default

• Minimum Value: -18000
• Maximum Value: 17999
• Minimum Display Value: -18000
• Maximum Display Value: 17999
• Divisor: 100

PITCH Range Default

• Minimum Value: -9000
• Maximum Value: 8999
• Minimum Display Value: -9000
• Maximum Display Value: 9000
• Divisor: 100

PERCENT Range Default

• Minimum Value: 0
• Maximum Value: 100
• Minimum Display Value: 0
• Maximum Display Value: 100
• Divisor: 1

THOUPERCENT Range Default

• Minimum Value: 0
• Maximum Value: 100000
• Minimum Display Value: 0
• Maximum Display Value: 100000
• Divisor: 100

HDG Range Default

• Minimum Value: 100
• Maximum Value: 36099
• Minimum Display Value: 1
• Maximum Display Value: 36000
• Divisor: 100

OBS Range Default

• Minimum Value: 1000
• Maximum Value: 360000
• Minimum Display Value: 0
• Maximum Display Value: 360000
• Divisor: 1000

DEVIATION Range Default

• Minimum Value: -1000
• Maximum Value: 1000
• Minimum Display Value: -1000
• Maximum Display Value: 1000
• Divisor: 1

FLAPS Range Default

• Minimum Value: -1000
• Maximum Value: 1000
• Minimum Display Value: -1000
• Maximum Display Value: 1000
• Divisor: 1

BRIGHTNESS Range Default

• Minimum Value: 0
• Maximum Value: 2000
• Minimum Display Value: 0
• Maximum Display Value: 2000
• Divisor: 1

COMFREQ Range Default

• Minimum Value: 11800000
• Maximum Value: 13699999
• Minimum Display Value: 11800000
• Maximum Display Value: 13699999
• Divisor: 100000

NAVFREQ Range Default

• Minimum Value: 10800000
• Maximum Value: 11799999
• Minimum Display Value: 10800000
• Maximum Display Value: 11799999
• Divisor: 100000

Dictionary Types This section declares the initial set of XSEDE dictionaries. Each dictionary is defined by a name and short definition. It contains a set of entries that represent the name value mappings of the dictionary. There are some primitive dictionaries without entries that specify the format of the data (i.e. octal or hex)

numbersok - Options for whether bare numbers are acceptable

• FALSE (0) : Bare numbers are not permitted
• TRUE (1) : Bare numbers are permitted and in output strings are represented in decimal form
• OCTAL (2) : Bare numbers are permitted and in output strings are represented in octal
• HEX (3) : Bare numbes are permitted and in output strings are represented in hexadecimal

ttl_mems - Convert times to their closest 8-bit mantissa-exponent representation

• NEVER (0) : Does not expire
• DEFAULT (256) : Use default value if specified elsewhere

none - Generic unsigned 32-bit value

signedval - Generic signed 32-bit value

hex - Hexadecimal representation

octal - Octal representation

component_feature - Flags that specified requested features or actions of a component

• REQUEST_TIMESLOT ((1U << 0)) : Request a timeslot (if supported)
• REQUEST_REALTIME ((1U << 1)) : Request hard realtime (if supported)
• NEED_CONFIGURE ((1U << 2)) : Component is launching in config mode
• NEED_DUMP ((1U << 3)) : At first run, perform dump instead of normal operation
• NEED_FORK ((1U << 4)) : At first run, become a background process (if supported)
• NEED_KILL ((1U << 5)) : Kill off a running version of the component (if supported)
• SKIP_LOADCONFIG ((1U << 6)) : Skip normal configuration loading
• HAS_TOUCH ((1U << 7)) : Application is running with an active touch interface
• HIDECMDLINE ((1U << 8)) : Hide command line outputs
• NOECHO ((1U << 9)) : Disable echo of received characters

component_debug - Component debugging flags

• RXDUMP ((1U << 0)) : Enable dumping of received messages from the XFS Bus by this component
• TXDUMP ((1U << 1)) : Enable dumping of messages transmitted to the XFS Bus from this component

agg_feature - Features associated with aggregated applications

• NONE (0) : No selected features
• PULLED ((1 << 0)) : Pulled
• COLLARED ((1 << 1)) : Should not be reset in flight
• AUTOSTART ((1 << 2)) : Automatically start on reboot if not pulled/collared
• AUTORESET ((1 << 3)) : Reset from pulled or tripped state on reset

canid - CAN ID special flags and numbers

• EFF ((1U << 31)) : Extended Frame Flag
• RTR ((1U << 30)) : Remote Transmission Request
• ERR ((1U << 29)) : Error Message

msg_cmd_updstat_flag - Maintenance mode status update flags

• SUCCESS ((1U << 0)) : Update is complete and successful
• ERROR ((1U << 1)) : Error during update

mm_apt_layer - Types of airports to display within layering of airport information

• PRIVATE ((1U << 0)) : Display private airports
• WATER ((1U << 1)) : Display sea ports
• HELI ((1U << 2)) : Display heliports
• MILITARY ((1U << 3)) : Display military airfields

mm_tlayer - Topology, raster and related static mapping layers

• NONE (0) : No Layers Enabled
• TOPO ((1U << 0)) : Topography
• TERRAIN ((1U << 1)) : Terrain warnings
• OBSTACLES ((1U << 2)) : Obstacles
• TRAFFIC ((1U << 3)) : Traffic
• VFR ((1U << 4)) : VFR Chart
• LOALT ((1U << 5)) : Low Altitude IFR
• HIALT ((1U << 6)) : High Altitude IFR
• CALLSIGNS ((1U << 7)) : Traffic Callsigns
• VORS ((1U << 8)) : VOR Stations
• FIXES ((1U << 9)) : RNAV Fixes
• WATER ((1U << 10)) : Detailed Water

mm_wlayer - Dynamic weather layers for maps

• NONE (0) : No Layers Enabled
• NEXRAD ((1U << 0)) : NEXRAD Radar Overlay
• WIND ((1U << 1)) : Wind Data
• LIGHTNING ((1U << 2)) : Lightning Overlay
• ICING ((1U << 3)) : Icing Forecast
• TURB ((1U << 4)) : Turbulence Forecast
• CLOUDS ((1U << 5)) : Cloud Tops Forecast

mm_alayer - DO-358A AIRMET and SIGMET layers for mapping

• NONE (0) : No Layers Enabled
• TFR ((1U << 0)) : Temporary Flight Restriction
• TURB ((1U << 1)) : Turbulence
• LLWS ((1U << 2)) : Low Level Wind Shear
• SFC ((1U << 3)) : Strong Surface Winds
• ICING ((1U << 4)) : Icing Conditions
• FRZLVL ((1U << 5)) : Lowest Freezing Level
• IFR ((1U << 6)) : Instrument Flight Conditions
• MTN ((1U << 7)) : Mountain Obscuration
• CONVSIG ((1U << 17)) : Convective Sigmet

mm_param - Parameters for rendering of moving maps

• SCALE (0x0001) : Map Scale in pixels per degree lat
• CLAT (0x0002) : Center map at this lattitude -- 0x80000000 to track aircraft
• CLON (0x0003) : Center map at this longitude -- 0x80000000 to track aircraft
• APTLAYER (0x0004) : Bitmask of XFS_MM_APT_LAYER_* for what to display
• WIDTH (0x0005) : Width in pixels of map
• HEIGHT (0x0006) : Height in pixels of map
• TLAYERS (0x0007) : Topography/Obstacle/Terrain/Traffic layers
• WLAYERS (0x0008) : Weather Layers layers
• ALTSEL (0x0009) : Altitude sel for Winds etc -- 0x80000000 to track current altitude
• ALAYERS (0x000a) : AIRMET/SIGMET layers
• AUTOTRACK (0x80000000) : AutoTrack value for tracking aircraft position and altitude

efb_param - Parameters for rendering of georeferenced procedures

• SCALE (0x0001) : EFB Scale in relative pixels where 1000 is 1:1 pixel scaling
• CLAT (0x0002) : Center map at this lattitude -- 0x80000000 to track aircraft
• CLON (0x0003) : Center map at this longitude -- 0x80000000 to track aircraft
• FIXNAME (0x0004) : Name of fix for which information is desired
• WIDTH (0x0005) : Width in pixels of EFB Content
• HEIGHT (0x0006) : Height in pixels of EFB Content
• PAGE (0x0007) : Name of page within EFB
• TARGET (0x0008) : Page specific target within EFB page

sv_param - Parameters for rendering of synthetic vision

• WIDTH (0x0001) : Width in pixels of view
• HEIGHT (0x0002) : Height in pixels of view

unit - XFS parameter unit values

• ANY (0xffff) : Any Unit

unitmask - Mask of unit values

• NONE (0) : No units selected
• 1 ((1U << 0)) : Unit 1 selected
• 2 ((1U << 1)) : Unit 2 selected
• 3 ((1U << 2)) : Unit 3 selected
• 4 ((1U << 3)) : Unit 4 selected
• 5 ((1U << 4)) : Unit 5 selected
• 6 ((1U << 5)) : Unit 6 selected
• 7 ((1U << 6)) : Unit 7 selected
• 8 ((1U << 7)) : Unit 8 selected
• 9 ((1U << 8)) : Unit 9 selected
• 10 ((1U << 9)) : Unit 10 selected
• 11 ((1U << 10)) : Unit 11 selected
• 12 ((1U << 11)) : Unit 12 selected
• 13 ((1U << 12)) : Unit 13 selected
• 14 ((1U << 13)) : Unit 14 selected
• 15 ((1U << 14)) : Unit 15 selected
• 16 ((1U << 15)) : Unit 16 selected
• 17 ((1U << 16)) : Unit 17 selected
• 18 ((1U << 17)) : Unit 18 selected
• 19 ((1U << 18)) : Unit 19 selected
• 20 ((1U << 19)) : Unit 20 selected
• 21 ((1U << 20)) : Unit 21 selected
• 22 ((1U << 21)) : Unit 22 selected
• 23 ((1U << 22)) : Unit 23 selected
• 24 ((1U << 23)) : Unit 24 selected
• 25 ((1U << 24)) : Unit 25 selected
• 26 ((1U << 25)) : Unit 26 selected
• 27 ((1U << 26)) : Unit 27 selected
• 28 ((1U << 27)) : Unit 28 selected
• 29 ((1U << 28)) : Unit 29 selected
• 30 ((1U << 29)) : Unit 30 selected
• 31 ((1U << 30)) : Unit 31 selected
• 32 ((1U << 31)) : Unit 32 selected

subunit - XFS parameter subunit values

• ANY (0xffff) : Any Subunit

preset - XFS Preset Frequency

• MANUAL (0) : Manual Tuning (no preset)
• LAST (0xfffe) : Last selected frequency

tcid - XFS transcoder ID values

• NONE (0) : No transcoder ID is required or asserted
• DEFAULT (65536) : Pseudo-value to represent global default

suip_id - SUIP Identifier

• NONE (0) : No SUIP ID for the actuator
• TOUCH (0xffff) : SUIP Via Touch

boolean - Nominal boolean values

• FALSE (0) : False
• TRUE (1) : True

ruleresult - Return values for XFS rules

• CLEAR (0) : Rule evaluates as false
• SET (1) : Rule evaluates as true
• UNKNOWN (-1) : Insufficient information to evaluate rule

alignment - Horizontal and vertical geometric alignments

• HMASK (0x0f) : Horizontal alignment mask
• HCENTER (0x01) : Horizontally centered
• LEFT (0x02) : Left aligned
• RIGHT (0x03) : Right aligned
• VMASK (0xf0) : Vertical alignment mask
• VCENTER (0x10) : Vertically centered
• BOTTOM (0x20) : Bottom aligned
• TOP (0x30) : Top aligned

engstate - States of engines

• UNKNOWN (0x00) : Engine Status Unknown
• OFF (0x01) : Engine is Off
• DRYMOTOR (0x02) : Engine Starting
• STARTING (0x03) : Engine Starting
• RUNNING (0x04) : Engine Running Normally
• FLAMEOUT (0x05) : Engine Flamed Out / Failure
• SHUTDOWN (0x06) : Engine Shutting Down
• SHUTOFF (0x07) : Engine Shut Off
• MODE_MASK (0xff) : Mask for Engine State
• FLAG_IGNITION ((1U << 8)) : Ignition On
• FLAG_FUEL ((1U << 9)) : Fuel Shutoff Open
• FLAG_STARTER ((1U << 10)) : Starter On
• FLAG_GENERATOR ((1U << 11)) : Generator On
• FLAG_BLEED ((1U << 12)) : Bleed Air On
• FLAG_FIRE ((1U << 16)) : Fire Present
• FLAG_EXTINGUISH ((1U << 17)) : Extinguisher Dispensed

pid_state - States of proportional-integral-derivative control logic

• UNKNOWN (0x00) : PID Status Unknown
• SETTLED (0x01) : PID Settled On Desired Value
• CONVERGING (0x02) : PID Oscillating With Decreasing Amplitude
• OSCILLATING (0x03) : PID Oscillating With Constant Amplitude
• DIVERGING (0x04) : PID Oscillating With Increasing Amplitude

shape - Shapes for use in vector drawings

• NONE (0x00) : No shape
• OVAL (0x01) : Oval Shape
• LINE (0x02) : Line Shape
• TRIANGLE (0x03) : Triangle Shape
• DIAMOND (0x04) : Diamond Shape
• PENTAGON (0x05) : Pentagon Shape
• HEXAGON (0x06) : Hexagon Shape
• SEPTAGON (0x07) : Septagon/Heptagon Shape
• OCTAGON (0x08) : Octagon Shape
• NONAGON (0x09) : Nonagon/Enneagon Shape
• DECAGON (0x0A) : Decagon Shape

ldggear - Status of retractable landing gear

• UNKNOWN (0x0000) : Gear Status Unknown
• DOWN (0x0001) : Landing Gear Down
• UP (0x8000) : Landing Gear Up
• FLAG_FAILED ((1U << 16)) : Landing Gear System is Failed

brake - Status of wheel brakes

• UNKNOWN (0x0000) : Brake Status Unknown
• NONE (0x0001) : Brakes not pressed
• MAX (0x8000) : Max Braking
• PARK ((1U << 16)) : Parking Brake Engaged
• FLAG_FAILED ((1U << 17)) : Brake System is Failed

ecbunit - ECB unit numbers

• TYPE_MASK (0xf000) : Mask for ECB type flag
• TYPE_ECB (0x0000) : Generic ECB
• TYPE_BUS (0x1000) : Bus
• TYPE_GENALT (0x2000) : Starter/Generator/Alternator
• TYPE_BATT (0x3000) : Battery

icing_flag - Status of ice detection, anti-ice and deicing systems

• ENGINE ((1U << 0)) : Engine Deicing/Anticing On
• AIRFRAME ((1U << 1)) : Airframe Deicing/Anticing On
• INSEP ((1U << 2)) : Inertial Separator Activated
• PITOT ((1U << 3)) : Pitot/Static Heat Activated
• PROPHEAT ((1U << 4)) : Propeller Heat Activated
• WINDHEAT ((1U << 5)) : Windshield Heat Activated
• CARBHEAT ((1U << 6)) : Carb Heat Activated
• CARBICEDET ((1U << 14)) : Carb Icing Detected
• ICEDET ((1U << 15)) : Icing Detected
• ENGINE_FAIL ((1U << 16)) : Engine Deicing/Anticing Failed
• AIRFRAME_FAIL ((1U << 17)) : Airframe Deicing/Anticing Failed
• INSEP_FAIL ((1U << 18)) : Inertial Separator Failed
• PITOT_FAIL ((1U << 19)) : Pitot/Static Heat Failed
• PROPHEAT_FAIL ((1U << 20)) : Propeller Heat Failed
• WINDHEAT_FAIL ((1U << 21)) : Windshield Heat Failed
• CARBHEAT_FAIL ((1U << 22)) : Carb Heat Failed
• CARBICEDET_FAIL ((1U << 30)) : Carb Icing Detection Failed
• ICEDET_FAIL ((1U << 31)) : Icing Detection Failed

cantun - CAN tunneling 29-bit address special fields

• TUNNEL ((1U << 28)) : Tunneled Data
• DEVMASK (0xff00000) : Mask for what type of device
• DEV_SERIAL (0x0100000) : RS-232/422/485 Serial Port
• DEV_CONFIG (0x0200000) : Configuration Commands
• DEV_HEALTH (0x0300000) : Health Status
• DEV_AR429 (0x0400000) : ARINC-429
• DEV_MIL1553 (0x0500000) : MIL-STD-1553
• DEV_ECB (0x0600000) : Electronic Circuit Breaker
• DEV_GPIO (0x0700000) : GPIO's
• DEV_CANBUS (0x0800000) : Reserved for possible CAN in CAN tunneling
• OPMASK (0xf0000) : Mask for what operation on device
• OPTXMASK (0x10000) : Operation is a transmit operation
• OP_RXDATA (0x00000) : Received from peripheral
• OP_TXDATA (0x10000) : Transmit to peripheral
• OP_RXSTATUS (0x20000) : Status Information Reply
• OP_TXSTATUS (0x30000) : Transmitted Status Information Request
• OP_RXFLAGS (0x40000) : Current received flags + status (48 bits total)
• OP_TXFLAGS (0x50000) : Set transmit flags + status (48 bits total)
• SEQNO_FLAG_BEGIN ((1U << 15)) : Beginning of a whole message (Transmit)
• SEQNO_FLAG_END ((1U << 14)) : End of a whole message
• SEQNO_MASK (0x3fff) : Max Sequence number

cantun_cmd - CAN configuration commands

• ACK (0x01) : Or'd with command for response
• DISCOVER (0x02) : Each unit sends a reply with its ID in response to a discover
• CONCONSOLE (0x04) : Connect Console
• DISCONSOLE (0x06) : Disconnect Console

cantun_txstatus_flag - CPU to non-CPU communication of status

• RESETMISS ((1U << 0)) : Reset miss counters
• CPUSEL ((1U << 15)) : Count with respect to CPU

config_type - XFS configuration file value data types

• SINT (1) : 32-bit signed 2's complement integer
• UINT (2) : 32-bit unsigned integer
• STRING (3) : Optionally null terminated string
• FLOAT (4) : IEEE 754 floating point number
• IPADDR (5) : 32-bit IPv4 IP address
• SIGNATURE (255) : System specific cryptographic signature
• OBJECTBEG (256) : Begin an object definition
• OBJPTRBEG (257) : Begin pointer to an object
• OBJECTSEP (258) : Separates entries in an array
• OBJECTEND (259) : Ends an entry for an object or object pointer

config_perm - XFS configuration file value permissions

• MANDATORY ((1U << 16)) : Must be specified
• DELEGATE ((1U << 8)) : Allow delegating permission to level in bits 7-0
• VENDOR (200) : Avionics Vendor
• FACTORY (150) : Aircraft Manufacturer
• OWNER (125) : Aircraft Owner
• MAINT (100) : Aircraft Maintenance Facility
• SYSTEM (90) : Saved Aircraft State
• DATA (75) : Navigational Data
• USER (50) : Pilot
• INHERIT (1) : Object parameters inherit from object permission
• UNSET (0) : Permission has not been established

msg_class - XFS common data bus message classes

• MAINT (2) : Maintenance Message
• OP (3) : Operational Message
• RAW (4) : Access to raw data stream (e.g. RS-232, RS-485, ARINC-429, etc)

ac_status - XFS aircraft state

• GND (0) : Non flight mode
• FLIGHT (1) : Aircraft in flight
• MAINT (2) : Aircraft is in maintenance mode

msg_op - Message subclasses for operational message class

• SUBFLDATA (1) : Subscribe to Aircraft Flight Data Params
• FLIGHTDATA (2) : Flight Data Info
• DEVSTATUS (3) : Device Status
• GDL90 (4) : GDL-90 Format Messages without framing, FCS or escape characters
• SUBMSGCLID (5) : Subscribe to Specific Message Class and ID

msg_raw - Message subclasses for raw message class

• SERIALRX (1) : Serial raw data stream receive from end device
• SERIALTX (2) : Serial raw data stream transmit to end device
• SPIRX (5) : Raw SPI bus receive from end device
• SPITX (6) : Raw SPI bus transmit to end device
• ARINC429RX (7) : Raw ARINC-429 bus receive from end device
• ARINC429TX (8) : Raw ARINC-429 bus transmit to end device
• MIL1553RX (9) : Raw MIL-STD-1553 received from end device
• MIL1553TX (10) : Raw MIL-STD-1553 bus transmit to end device
• ECBRX (11) : Raw XFS ECB control receive from end device
• ECBTX (12) : Raw XFS ECB control transmit to end device
• GPIORX (13) : Raw XFS ECB control receive from end device
• GPIOTX (14) : Raw XFS ECB control transmit to end device
• ADCRX (15) : Analog/Digital Converter receive from end device
• DACTX (16) : Digital/Analog Converter transmit to end device
• CANBUSRX (17) : Raw CAN bus receive from end device
• CANBUSTX (18) : Raw CAN bus transmit to end device
• DATAGRAMRX (19) : Raw Datagram receive from end device
• DATAGRAMTX (20) : Raw Datagram transmit to end device

msg_maint - Message subclasses for maintenance message class

• MXREQ (1) : Request maintenance mode for a specific CPU (or all if cpu is empty)
• MXCHAL (2) : Authentication challenge
• MXAUTH (3) : Authentication response
• MXACCEPT (4) : Accept authentication request
• MXDENY (5) : Deny maintenance mode
• MXREADY (6) : Ready for update or diagnostic
• DOUPDATE (7) : User Requests System Update. Note CPU is requestor
• UPDREQ (8) : Request Update for given Device
• UPDSTAT (9) : Status of Update
• DODIAG (10) : User Requests System Update. Note CPU is requestor. Salt is type of diagnostic.
• DIAGREQ (11) : Request diagnostic for given Device.
• DIAGSTAT (12) : Status of Update

msg_flag_cert - Message and parameter certification level tracking

• EXPERIMENTAL (0) : Experimental
• LEVEL_E (1) : DO-178 Level E
• LEVEL_D (2) : DO-178 Level D
• LEVEL_C (3) : DO-178 Level C
• LEVEL_B (4) : DO-178 Level B
• LEVEL_A (5) : DO-178 Level A

msg_source_flag - Flags for XFS message sources

• ALWAYSXMIT ((1U << 0)) : Transmit all parameters even if confidence is useless
• COPYSELF ((1U << 1)) : Process this message as a received message as well
• DEBUGONLY ((1U << 2)) : This message is only used only for debugging and not normal operation
• IMMPREBUF ((1U << 3)) : Immediately prebuffer parameters within this message even before transmission

param_source_flag - Flags for individual parameter sources within XFS message sources

• ALWAYSVALID ((1U << 0)) : Parameter source has a fixed value
• TRIGGERXMIT ((1U << 1)) : Candidate for triggering message transmission

param_confidence - XFS common bus parameter format confidence levels

• HIGH (100) : Confirmed known value
• USERSEL (90) : User selected value at runtime
• SYSSEL (80) : System selected value at runtime
• UNANIMOUS (50) : Redundant data available and is rationalized
• RATIONAL (40) : Data being rationalized from other data sources with normal sources ignored
• VOTED (30) : Data is redundantly verified from identical instruments
• SMOOTHED (20) : Smoothed/filtered version of raw data
• RAW (10) : Raw, unchecked data
• ESTIMATE (5) : Rough estimation
• USELESS (0) : Value is missing or expected invalid and supplied for debugging ONLY

endian - CPU endian formats

• HOST (0) : Host Endian Byte Order
• LITTLE (1) : Little Endian Byte Order
• BIG (2) : Big Endian Byte Order

datagram_direction - Datagram Direction Types

• UNKNOWN (0) : Unknown or unspecified direction type
• SOURCE (1) : We are a source of information for this connection
• DESTINATION (2) : We are a destination of information for this connection
• BIDIRECTIONAL (3) : We are both a source and destination of information for this connection

param_units - Units for the encoding and translation of XFS parameters

• UNSPEC (0x0) : Units not specified
• INHG (0x0001U) : Use inches of Hg for BARO/MANPRES
• FT (0x0002U) : Use feet for altitude
• NM (0x0003U) : Use nautical miles for distance
• C (0x0004U) : Use celcius for temperature
• LBFT (0x0005U) : Use pound-feet for torque
• S (0x0006U) : Use seconds for time
• A (0x0007U) : Use amps for current
• V (0x0008U) : Use volts for voltage
• LB (0x0009U) : Use pounds for weight
• IN (0x000aU) : Use inches for distance
• FPM (0x000bU) : Use feet per minute for rate of climb/descent
• LBPH (0x000cU) : Pounds per Hour for fuel flow
• DEGPS (0x000dU) : Degrees per second for attitude change
• DEG (0x000eU) : Degrees for attitude
• G (0x000fU) : G force for load
• RGBA (0x0010U) : 8888 RGBA Value
• MHZ (0x0011U) : Megahertz for Frequency
• PCENT (0x0012U) : Percent of Maximum
• KT (0x0013U) : Knots for Speed
• NMPLB (0x0014U) : Nautical Miles per Pound
• KTPS (0x0015U) : Knots per second
• MACH (0x0016U) : Speed of sound
• CPM (0x0017U) : Count per minute
• PPM (0x0018U) : Parts per million
• LPM (0x0019U) : Liters Per Minute
• KW (0x001aU) : Kilowatt
• AH (0x001bU) : Amp Hour
• GAL (0x001cU) : Gallons of volume
• NMPGAL (0x001dU) : Nautical Miles per Gallon
• GPH (0x001eU) : Gallons per Hour for fuel flow
• MEMS (0x001fU) : Mantissa/Exponent Milliseconds (2^E)*(M+16)
• HPA (0x8001U) : Use Hecto pascals for BARO
• M (0x8002U) : Use meters for altitude
• SM (0x8003U) : Use statute miles for distance
• F (0x8004U) : Use fahrenheit for temperature
• NWM (0x8005U) : Use Newton Meters for torque
• PSI (0x8006U) : Use PSI for MANPRES
• MPH (0x8007U) : Use miles per hour for speed
• SMPLB (0x8008U) : Statute Miles per Pound
• MIN (0x8009U) : Minutes
• HR (0x800aU) : Hours
• HP (0x800bU) : Use Horsepower for power
• KG (0x800cU) : Use kilograms at earth gravity for weight
• L (0x801cU) : Liters of volume
• LPH (0x001eU) : Liters per Hour for fuel flow
• UL (0xffffU) : Unitless

param_copy_result - Possible return results from copying parameters from/to network format

• SUCCESS (0) : Parameter copied/loaded properly
• UNKNOWN_PARAM ((1U << 0)) : Parameter not known
• UNKNOWN_FORMAT ((1U << 1)) : Parameter format not known
• MISMATCH_FORMAT ((1U << 2)) : Parameter format does not match what we expect its format to be
• MISSING ((1U << 3)) : Source of parameter (e.g. config file) is missing or empty
• CHKSUMFAIL ((1U << 4)) : Source of parameter had failed checksum
• DESIGNFAIL ((1U << 5)) : Design of parameter system contains an error
• IMPROPER_FORMAT ((1U << 6)) : Conversion of parameter from ASCII source encountered syntactical error
• UNIMPLEMENTED ((1U << 7)) : This method of copying a parameter is not implemented
• POS_NOT_FOUND ((1U << 8)) : Position not found
• IO_ERROR ((1U << 9)) : I/O Error
• SHORT_SRC ((1U << 10)) : Insufficient data in source parameter
• SHORT_DST ((1U << 11)) : Insufficient data in destination parameter

cas_msglvl - Message levels for CAS messages and checklist items

• CLEAR (0) : Clear a previously issued CAS message -- issue from system only
• DEBUG (1) : In-system debugging output only
• LOG (2) : Log to system log, but do not display
• MAINT (3) : Display only for maintenance purposes
• STATUS (4) : Aircraft system status only
• ADVISORY (5) : Advisory, flight crew should be aware, may require later crew response
• CAUTION (6) : Caution, requires immediate flight crew awareness and later response
• WARNING (7) : Warning, requires immediate awareness and response.
• COMMENT (10) : Checklist Comment Associated with Previous Item
• UNCHKITEM (11) : Unchecked Checklist Item
• CHKITEM (12) : Checked Checklist Item
• CHKBRANCH (13) : Checklist Branch Choice
• PASS (14) : Built-in Test (BIT) Item passed
• INPROG (15) : Built-in Test (BIT) Item in progress
• NOTREQST (16) : Built-in Test (BIT) Item not yet requested
• INCOMPLT (17) : Built-in Test (BIT) Item test did not complete
• FAIL (18) : Built-in Test (BIT) Item failed

cas_msgflag - Additional flags associated with CAS messages

• NONE (0) : No additional flags
• AUTO ((1U << 0)) : Item is automatically checked/unchecked or the test is automatically executed

sched_period - Schedule periods with special meanings

• 10MS (10000) : Every task should run at least once per 10ms
• 1MS (1000) : Every task should run at least once per 1ms
• 100US (100) : Every task should run at least once per 100uS
• 30FPS (33333) : Thirty Frames per Second

tick_color - Color values for ticks within range parameters

• GREEN (0) : Green Area
• YELLOW (1) : Yellow Area
• RED (2) : Red Area
• WHITE (3) : White Area
• CLEAR (4) : Empty / no color
• BLUE (5) : Blue line -- does not change color above

com_state - State of communication radio

• IDLE (R) : Ready to Receive (Idle)
• RX (r) : Active receiving
• TX (T) : Active transmitting
• STUCK (S) : Stuck Mic
• FAULT (F) : Fault

com_target - COM Radio Target Destination

• INAIR (0) : Radio used primarily for in-air communication
• GROUND (1) : Radio used primiarly for on/to-ground communication
• BOTH (2) : Radio used equally for in-air and on-ground communication

ics_mode - State of intercom system

• PILOT (P) : Pilot Isolate
• CREW (C) : Crew Isolate
• ALL (A) : All
• FEATUREMASK (0xff00) : Mask for intercom features
• POSITIONAL ((1U << 8)) : Positional dynamic audio

xpdr_mode - Transponder mode and flags

• UNKNOWN (0) : Unknown
• MODEMASK (0x7f) : Mask for mode
• STANDBY (O) : Standby
• GND (G) : On Ground
• AIR (A) : Air/Altitude Reporting
• FLAG_IDENT ((1U << 7)) : IDENT Active

traffic_type - Traffic threat categorization

• NONTHREAT (0) : Non Threatening
• PROXIMITY (1) : Proximity
• ADVISORY (2) : Advisory
• RESOLUTION (3) : Resolution

nav_flag - Navigational flag states

• BACKCOURSE ((1U << 0)) : NAV receiver is flying a localizer back course
• LOCDETECT ((1U << 1)) : The NAV receiver is detecting a localizer
• FROM ((1U << 2)) : The FROM flag is detected from a VOR
• TO ((1U << 3)) : The TO flag is detected from a VOR
• GSI_SFLAG ((1U << 4)) : The glideslope superflag is present
• GSI_VALID ((1U << 5)) : The glideslope signal is being received and is valid
• NAV_SFLAG ((1U << 6)) : The NAV super flag is present
• NAV_VALID ((1U << 7)) : The localizer or VOR signal is being received and is valid
• FAULT ((1U << 8)) : Fault detected

weightbal_station - Weight and balance station types

• HULL (1) : This station corresponds to the basic empty aircraft
• FUEL (2) : This station is a fuel tank. Its weight will be in XFS_PARAM_FUELWT
• PASSENGER (3) : This station contains a passenger
• BAGGAGE (4) : This station contains baggage or cargo

weightbal_category - Aircraft operational categories

• NORMAL (1) : Normal Category
• UTILITY (2) : Utility Category
• ACROBATIC (3) : Acrobatic Category
• COMMUTER (4) : Commuter Category

weightbal_status - Weight and balance status

• OK (0) : Weight and balance is OK
• FWD ((1U << 0)) : Balance is forward of minimum CG for this weight
• AFT ((1U << 1)) : Balance is aft of maximum CG for this weight
• OVWTSTATN ((1U << 2)) : One or more stations are overweight
• OVERMGTOW ((1U << 3)) : Weight exceeds maximum gross takeoff weight
• OVERMLW ((1U << 4)) : Weight exceeds max landing weight
• OVERZFW ((1U << 5)) : Weight exceeds max zero fuel weight

flight_state - Status of aircraft within flight profile

• UNKNOWN (0) : The state of the aircraft is not known
• OFF (1) : The aircraft is completely powered down
• HIBERNATE (2) : Minimal aircraft systems online not visible to the pilot
• PREFLIGHT (3) : Minimal aircraft systems for pilot interaction online
• ENGINE_START (4) : Engine(s) are preparing to start or are starting
• PRETAXI (5) : Engine(s) are started, awaiting pre-taxi items
• TAXI (6) : Aircraft is ready or in process of taxiing
• RUNUP (7) : Aircraft is ready for, or in process of performing runup
• READY (8) : Aircraft is ready for and positioned just short of takeoff
• TAKEOFF (9) : Aircraft is in process of performing takeoff
• AFTER_TAKEOFF (10) : Aircraft is airborne immediately but not yet configured for normal climb
• DEPARTURE (11) : Aircraft is on a standard instrument departure
• CLIMB (12) : Aircraft is climbing but not on an instrument departure
• CRUISE (13) : Aircraft is at final cruise
• DESCENT (14) : Aircraft is descending not on a standard arrival
• ARRIVAL (15) : Aircraft is on a standard arrival
• APPROACH (16) : Aircraft is on an instrument approach procedure
• VISUAL (17) : Aircraft is flying a visual traffic pattern
• MISSED (18) : Aircraft is executing a missed approach
• SHUTDOWN (19) : Aircraft engines are shutting down or have shut down
• SECURE (20) : Aircraft systems are shutting down or reconfiguring for preflight

nav_gps - Global positioning system status

• UNKNOWN (0) : GPS Navigation is in unknown state
• ENROUTE (1) : GPS Navigation is in Enroute state
• TERMINAL (2) : GPS Navigation is Terminal state
• LNAV (3) : GPS Navigation is in Lateral Navigation State
• LNAVVNAV (4) : GPS Navigation is Lateral and Vertical NAV state
• LP (5) : GPS Navigation is in Localizer Performance state
• LPV (6) : GPS Navigation is in Localizer Performance/Vertical state

ecb_state - Electronic circuit breaker status

• UNKNOWN (0) : Circuit is in an unknown condition
• OFF (1) : Circuit is turned off
• ON (2) : Circuit is turned on
• UNDERCUR (3) : Circuit is on, <100ma current drawn
• RESET (4) : Request Reset
• FORWARD (5) : ECB is active logical FWD direction
• REVERSE (6) : ECB is active logical REV direction
• TARGET (7) : ECB is set by target, not ON/OFF
• BRAKELOW (8) : ECB is set by target, not ON/OFF
• SHORTED (128) : Short Circuit
• OVERCUR (129) : Overcurrent (but not short circuit)
• OVERVOL (130) : Overvoltage situation
• DISABLED (131) : Disabled by state-fault
• RUNAWAY (132) : Disabled due to runaway (trim/flaps)
• COLLARED (133) : Should not reset in flight
• JAMMED (134) : Mechanical Jam detected
• PULLED (135) : Pulled
• BACKFLOW (136) : Disabled due to reverse current flow

ecb_flag - Electronic circuit breaker parameter flags

• INPUTVOLTS ((1U << 0)) : Input Volts field is valid

scb_state - Software circuit breaker states

• UNKNOWN (0) : State of software is unknown
• STARTING (1) : Application is in startup phase
• RUNNING (2) : Application is running
• STOPPING (3) : Stopping has been requested
• RESTART (4) : Restart Application (PULL + RESET + START)
• RESET (5) : Allow application to be started
• HUNG (6) : Application is running but is no longer responsive
• DEGRADED (127) : Application is running in a degraded mode
• STOPPED (128) : Application is stopped
• STARTFAIL (129) : Application failed startup
• RUNAWAY (130) : Application has a runaway loop
• OVERCPU (131) : Application is using excessive CPU while in RUNNING state
• OVERMEM (132) : Application terminated due to memory overrun
• EXCEPTION (133) : Application terminated due to runtime exception
• ENDED (134) : Application ended without error or request
• ENDERROR (135) : Application ended with error condition
• PULLED (136) : Application should not be allowed to run until reset
• COLLARED (137) : Should not reset in flight

afcs_fd_mode - Vertical, lateral and yaw modes of flight director

• VERT_MASK (0xff) : Vertical modes mask
• LAT_MASK (0xff00) : Lateral modes mask
• YAW_MASK (0xff000000) : Yaw modes mask
• PITCH ((1U << 0)) : Activate pitch mode
• VS ((1U << 1)) : Activate vertical speed mode
• FLC ((1U << 2)) : Activate indicated airspeed mode / flight level change
• PRF ((1U << 3)) : Activate angle of attack / performance mode
• ALT ((1U << 4)) : Arm Altitude mode
• VNAV ((1U << 5)) : Arm vertical nav mode
• GP ((1U << 6)) : Arm approach mode vertical portion
• FLARE ((1U << 7)) : Arm flare mode
• ROLL ((1U << 8)) : Activate wing leveler mode
• HDG ((1U << 9)) : Activate heading mode
• NAV ((1U << 10)) : Arm navigation mode
• APPR ((1U << 11)) : Arm approach mode
• YD ((1U << 24)) : Fixed Yaw Damper
• SLIP ((1U << 25)) : Activate slip mode (adjustable YD)
• SLIPAPPR ((1U << 26)) : Activate approach slip mode (adjustable YD)

afcs_ap_mode - Vertical, lateral and yaw modes of autopilot and throttle

• VERT_MASK (0xff) : Vertical modes mask
• LAT_MASK (0xff00) : Lateral modes mask
• THROT_MASK (0xff0000) : Throttle modes mask
• YAW_MASK (0xff000000) : Yaw modes mask
• PITCH ((1U << 0)) : Pitch mode
• EPPITCH ((1U << 1)) : Pitch mode only for envelope protection
• ROLL ((1U << 8)) : Roll mode
• EPROLL ((1U << 9)) : Roll mode only for envelope protection
• SPD ((1U << 16)) : Activate autothrottle speed tracking
• EPSPD ((1U << 17)) : Autothrottle only for envelope protection (SPD mode)
• AOA ((1U << 18)) : Activate autothrottle AoA tracking
• EPAOA ((1U << 19)) : Autothrottle only for envelope protection (AOA mode)
• TOGA ((1U << 20)) : Activate takeoff / go-around throttle
• EPTOGA ((1U << 21)) : Autothrottle only for envelope protection (TOGA mode)
• YAW ((1U << 24)) : Yaw mode
• EPYAW ((1U << 25)) : Yaw envelope protection

afcs_servo - Servo engagement flags

• ENGAGE ((1U << 31)) : If present in engagement request, along with 'ENGAGED' value, set engagment status
• ENGAGED (1) : For requests, retain current engagement state, for status, present if currently engaged
• DISENGAGED (0) : If engaged, disengage and for status, currently disengaged

fms_flag - Flight management system waypoint and leg flags

• NONE (0) : No flags or leg type known
• LEGTYPE_VA (1) : Heading to Altitude
• LEGTYPE_VD (2) : Heading to DME Distance
• LEGTYPE_VI (3) : Heading to Next Leg Intercept
• LEGTYPE_VM (4) : Heading to Manual Termination
• LEGTYPE_VR (5) : Heading to Radial Termination
• LEGTYPE_CA (6) : Course to an Altitude
• LEGTYPE_CD (7) : Course to a DME Distance
• LEGTYPE_CI (8) : Course to Next Leg Intercept
• LEGTYPE_CR (9) : Course to Radial Termination
• LEGTYPE_CF (10) : Course to a Fix
• LEGTYPE_TF (11) : Tracking Between Two Fixes
• LEGTYPE_DF (12) : Direct to a Fix
• LEGTYPE_FA (13) : Course from a Fix to an Altitude
• LEGTYPE_FC (14) : Course from a Fix to an Along Track Distance
• LEGTYPE_FD (15) : Course from a Fix to a DME Distance
• LEGTYPE_FM (16) : Course from a Fix to a Manual Termination
• LEGTYPE_AF (17) : Constant DMA Arc to a Fix
• LEGTYPE_HF (18) : Hold to a Fix
• LEGTYPE_HA (19) : Hold to an Altitude
• LEGTYPE_HM (20) : Hold to a Manual Termination
• LEGTYPE_IF (21) : Initial Fix
• LEGTYPE_PI (22) : Procedure Turn to Intercept
• LEGTYPE_RF (23) : Radius to a Fix
• LEGTYPE_MASK (0xff) : Mask with which to retrieve leg type
• FLYOVER ((1U << 8)) : If not present, fly by
• DISC ((1U << 9)) : If present, Discontinuity before current waypoint
• ACTIVE ((1U << 10)) : If present, this is the active waypoint
• OBS ((1U << 11)) : If present, waypoint allows OBS to be set
• FAF ((1U << 12)) : If present, waypoint is final approach fix or after
• SUSPEND ((1U << 13)) : FMS sequencing is suspended at this waypoint
• LAST ((1U << 14)) : This waypoint is the last one in the flight plan

fms_waypoint - Flight management system waypoint types

• UNKNOWN (0) : Unknown or unspecified
• GS ((1U << 7)) : Glideslope component
• DME ((1U << 6)) : DME Component
• TACAN ((1U << 5)) : TACAN Component
• VOR (1) : VOR Component
• LOC (2) : Localizer component
• NDB (3) : NDB component
• LDA (4) : LDA Component
• SDF (5) : SDF Component
• FIX (6) : Generic RNAV Fix
• ILS (7) : Complete ILS system
• AIRPORT (8) : An Airport
• DIRECTFROM (9) : Starting point of a direct to
• WEATHER (10) : Weather reporting station only

fms_waypoint_subunit - Special subunits used within the FMS

• FIRST (1) : Starting waypoint of flight plan
• FIRSTAP (65530) : First airport within flight plan
• PREV (65531) : Starting waypoint of the active leg (if leg is not a direct to)
• NEXT (65532) : Ending waypoint of the active leg
• LASTAP (65533) : Final airport of flight plan if more than one airport in plan
• LAST (65534) : Final waypoint of flight plan

fms_airport - Flight management system airport types

• UNKNOWN (0) : Unknown type of airport
• AIRPORT (1) : An actual airport
• BALLOON (2) : A Balloonport
• SEAPLANE (3) : A Seaplane Base
• GLIDER (4) : A Glider Port
• HELIPORT (5) : A Heliport
• ULTRALIGHT (6) : Ultralight Field
• FLAG_CUSTOMS ((1U << 8)) : Customs Available
• FLAG_TOWER ((1U << 9)) : Tower Available
• FLAG_PUBLIC ((1U << 10)) : Public Use
• FLAG_CLOSEDIND ((1U << 11)) : Closed Indefinitely
• FLAG_CLOSEDPERM ((1U << 12)) : Closed Permenantly
• FLAG_JETA ((1U << 13)) : JET-A Available
• FLAG_100LL ((1U << 14)) : 100LL Available
• FLAG_MOGAS ((1U << 15)) : Oxygen Available
• FLAG_BEACON ((1U << 16)) : Beacon Present
• FLAG_AFMAJOR ((1U << 17)) : Major Airframe
• FLAG_AFMINOR ((1U << 18)) : Minor Airframe
• FLAG_PPMAJOR ((1U << 19)) : Powerplant Major
• FLAG_PPMINOR ((1U << 20)) : Powerplant Minor
• FLAG_OXYGEN ((1U << 21)) : Oxygen Available
• FLAG_MILITARY ((1U << 22)) : Military

fms_rwy - Flight management system runway parameters and flags

• SURF_UNKNOWN (0) : Unknown Surface
• SURF_ASPHALT ((1U << 0)) : Asphalt
• SURF_CONC ((1U << 1)) : Concrete
• SURF_SNOW ((1U << 2)) : Snow
• SURF_ICE ((1U << 3)) : Ice
• SURF_MATS ((1U << 4)) : Mats
• SURF_TREATED ((1U << 5)) : Oiled
• SURF_GRAVEL ((1U << 6)) : Gravel
• SURF_TURF ((1U << 7)) : Grass / Sod
• SURF_DIRT ((1U << 8)) : Natural Soil
• SURF_WATER ((1U << 9)) : Water Runway
• SURF_OTHER ((1U << 10)) : Wood
• SURF_MATERIAL_MASK (0x7ff) : Mask for surface material
• SURF_EXCL ((1U << 11)) : Excellent Condition
• SURF_GOOD ((1U << 12)) : Good Condition
• SURF_FAIR ((1U << 13)) : Fair Condition
• SURF_POOR ((1U << 14)) : Poor Condition
• SURF_FAILED ((1U << 15)) : Failed Condition
• SURF_COND_MASK (0xf800) : Mask for surface material
• LIGHTS_HIGH ((1U << 16)) : Edge Lights High
• LIGHTS_MED ((1U << 17)) : Medium Edge Lights
• LIGHTS_LOW ((1U << 18)) : Low Edge Lights
• LIGHTS_NSTD ((1U << 19)) : Non-Standard
• LIGHTS_NONE ((1U << 20)) : No Edge Lights
• LIGHTS_OTHER ((1U << 21)) : Other edge lights
• RIGHT_HAND ((1U << 22)) : Right Hand Traffic

fms_container - Flight management system container types

• UNKNOWN (0) : Unspecified or unknown container
• NONE (1) : No container
• VICTOR (2) : VOR Airway
• JET (3) : Jet Airway
• AMBER (4) : Amber Airway
• BLUE (5) : Blue Airway
• GREEN (6) : Green Airway
• RED (7) : Red Airway
• Q (8) : RNAV Q Routes
• T (9) : RNAV T Routes
• STAR (10) : Standard Arrival Procedure
• DP (11) : Standard Departure Procedure
• APP (12) : Instrument Approach
• RWY (13) : Airport Runway Surface Selection

fms_airspace - Flight management system airspace types and flags

• CLASS_A (A) : Class A Airspace
• CLASS_B (B) : Class B Airspace
• CLASS_C (C) : Class C Airspace
• CLASS_D (D) : Class D Airspace
• AGLFLAG ((1U << 20)) : If present in positive numbers, Airspace is relative to ground level
• AAFLAG ((1U << 21)) : If present, in positive number, airspace is capped by the airspace above

osk_key - On screen keyboard keys

• 0 (48) : Character 0
• 1 (49) : Character 1
• 2 (50) : Character 2
• 3 (51) : Character 3
• 4 (52) : Character 4
• 5 (53) : Character 5
• 6 (54) : Character 6
• 7 (55) : Character 7
• 8 (56) : Character 8
• 9 (57) : Character 9
• A (65) : Character A
• B (66) : Character B
• C (67) : Character C
• D (68) : Character D
• E (69) : Character E
• F (70) : Character F
• G (71) : Character G
• H (72) : Character H
• I (73) : Character I
• J (74) : Character J
• K (75) : Character K
• L (76) : Character L
• M (77) : Character M
• N (78) : Character N
• O (79) : Character O
• P (80) : Character P
• Q (81) : Character Q
• R (82) : Character R
• S (83) : Character S
• T (84) : Character T
• U (85) : Character U
• V (86) : Character V
• W (87) : Character W
• X (88) : Character X
• Y (89) : Character Y
• Z (90) : Character Z
• PREV (60) : Previous position or <
• NEXT (62) : Next position or >
• DEG (127) : Degrees
• DIRECTTO (128) : Direct To
• ENT (129) : Enter

chart_type - Instrument procedure and airport chart/diagram types

• APPROACH (1) : Instrument Approach
• DEPARTURE (2) : Instrument Departure
• ARRIVAL (3) : Instrument Arrival
• DIAGRAM (4) : Airport Diagram
• HOTSPOT (5) : Hot Spot
• LAHSO (6) : Land and Hold Short
• ALTMIN (7) : Alternate Minimums
• OBSDEP (8) : Obstacle Departure Procedure
• DEPAAU (9) : Departure / Attention All Users
• SUPPLEMENT (255) : Supplemental Data

db_param - Database parameter identifiers and formats

• FORMAT_MASK ((0xffU << 24)) : Mask for Format portion
• FORMAT_INT ((0 << 24)) : 32-bit 2's complement signed integer
• FORMAT_FLOAT ((1U << 24)) : IEEE 754 floating point number
• FORMAT_STRING ((2U << 24)) : Optionally NULL terminated string
• AIRPORT (0) : Airport Name
• SERVICE (1) : Service name (e.g. ATIS, AWOS, TOWER, APPROACH, DEPARTURE, CENTER, CLEARANCE, GROUND)
• FREQKHZ_DEPRECATED (2) : Frequency in Khz
• COMMENT (3) : Comment associated with Frequency
• PHONE (4) : Phone number
• SECONDARY (5) : If a value is secondary, it's priority (lower is higher priority)
• FIXNAME (6) : Name of Fix
• LATITUDE (7) : Latitude
• FLAGS (8) : Generic flags
• CONTAINER (9) : Name of airway, arrival, star or other container
• CTYPE (10) : Type of container
• WTYPE (11) : Type of FIX/Waypoint
• INBOUND (12) : Inbound magnetic course
• OUTBOUND (13) : Outbound magnetic course in
• MAGADJ (14) : Magnetic Adjustment
• ALTITUDE (15) : Altitude (MSL)
• LONGNAME (16) : Full name of fix or airport or airspace
• LONGITUDE (17) : Longitude
• APTTYPE (18) : Type of landing facility
• OPCOUNT (19) : Operations Count per year
• CITY (20) : Associated City
• STATE (21) : Associated State
• COUNTRY (22) : Associated Country
• RWYNAME (23) : Runway Name
• RWYSIZE (24) : Length in bottom 20 bits, Width in top 12 bits
• RWYLAT (25) : Lat of runway End
• RWYLON (26) : Lon of runway End
• RWYTHRS (27) : Displaced Threshold
• RWYSURF (28) : Runway Surface
• RWYALIGN (29) : Runway true alignment (in degrees)
• RWYELV (30) : Runway threshold elevation
• FLOOR (31) : Signed integer altitude floor in feet
• CEIL (32) : Altitude ceiling in feet
• AIRNAME (33) : Name / Class of airspace
• ALTAGL (34) : Altitude (AGL)
• OBSLIGHT (35) : Obstacle Lighting (from DOF)
• MOCA (36) : Minimum Crossing Altitude
• MCA (37) : Minimum Crossing Altitude
• MCAR (38) : Minimum Crossing Altitude (Reverse)
• MEA (39) : Minimum Enroute Altitude
• MEAR (40) : Minimum Enroute Altitude (Reverse)
• GMEA (41) : (GNSS) Minimum Enroute Altitude
• GMEAR (42) : (GNSS) Minimum Enroute Altitude (Reverse)
• MAXAA (43) : Maximum Authorized Altitude
• CLONGNAME (44) : Long Name of container
• PROCNAME (45) : Procedure or Chart Name
• CHARTTYPE (46) : Type of Chart
• IMAGENAME (47) : Image Name for Procedure
• TOP (48) : Top location in 1/10000 of a percent of full scale
• RIGHT (49) : Right location in 1/10000 of a percent of full scale
• BOTTOM (50) : Bottom location in 1/10000 of a percent of full scale
• LEFT (51) : Left location in 1/10000 of a percent of full scale
• XLOC (52) : X location in 1/10000 of a percent of full scale
• YLOC (53) : Y location in 1/10000 of a percent of full scale
• ORIENTATION (54) : Orientation in 1/10000 of a degree
• PROXIMITY (55) : Proximity of closest neighbor
• FREQMHZ (56) : Frequency

db_hashfunc - Database hash functions

• IDENT (1) : Alphanumeric Identifier
• INT (2) : Integer Number

devtype - XFS device types

• MCP (1) : Master Control Program
• ADC (2) : Air Data Computer Only
• AHRS (3) : Attitude Heading Reference System Only
• ADAHRS (4) : ADC and AHRS Combined
• SIM (5) : Simulated Data
• DSU (6) : Data Storage Unit -- Records Data
• FD (7) : Flight Director
• AP (8) : Automatic Pilot
• FMS (9) : Flight Management System
• PDU (10) : Power Distribution Unit
• TRIGGER (11) : Event Trigger Unit
• QAR (12) : Quick Access Recorder
• UI (13) : User Interface Device (but not flight display)
• COM (14) : Communication Radio
• NAV (15) : Navigation Radio
• AUDIOPANEL (16) : Audio Panel
• XPDR (17) : Transponder
• DAU (18) : Data Acquisition Unit (e.g. Engine)
• XFD (19) : Generic Flight Display
• SYNSENSOR (20) : Synthetic Sensor
• EFIS (21) : Integrated Standby EFIS
• OVERLAY (22) : Display overlay (e.g. System or Moving Map)
• SERVO (23) : Generic Servo Unit
• AIRFRAME (24) : Airframe specific description
• GPIO (25) : Generic GPIO Interface
• BRIDGE (26) : Protocol Bridge
• PROPGOV (27) : Propeller Governor control
• DATALINK (28) : Generic Data Link
• HAT (29) : Device for measuring height above terrain

suip_cmd - Serial User Interface Protocol commands

• DATATX (0x0001) : Send data to specific address.
• LONGPRESSTIME (0x0002) : How many milliseconds for a Long press (16-bit unsigned value in data)
• GENINC (0x0003) : Generic Encoder Increase
• GENDEC (0x0004) : Generic Encoder Decrease
• GENPUSH (0x0005) : Generic Encoder or Button Push
• GENLONGPUSH (0x0006) : Generic Encoder or Button Long Push
• GENRELEASE (0x0007) : Generic Encoder or Button Release
• IDENTREQ (0x000c) : Identify Device connected
• IDENTREP (0x000d) : Return identity to CPU (data is null terminated string)
• BRIGHTNESS (0x000e) : Addr is which device to change brightness (0 for all), data is 16 bits 0 (dark) to 65535 (bright)
• ISALIVE (0x000f) : Periodic message sent to indicate link is alive. Address is 0
• CONFIG (0x0010) : Device specific configuration. Address is device specific
• QUERY (0x0011) : Device specific query. Address is device specific
• REPLY (0x0012) : Device specific reply. Address is device specific
• DEBUG (0x0000) : Fake message which has debug info in it

touch_event - Touch event activities

• UNASSIGNED (0) : Touch event has not been assigned yet
• ORPHAN (1) : Touch did not begin within target
• LOST (2) : Touch did not remain within target
• ABANDON (3) : Touch released outside target
• PRESS (4) : Pressing on a touch surface
• DRAG (5) : Drag to a new location
• PINCH (6) : Two related touches dragged to new positions
• RELEASE (255) : Releasing from a touch surface

gpio_output - General purpose I/O output states

• NULL (0x00) : NO, GPIO port not available / not installed
• FLOAT (0x01) : FL, No pull up or pull down
• PULLDOWN (0x02) : PD, pulldown ~ 2.2k
• PULLUP (0x03) : PU, pullup ~ 2.2k
• LOW (0x04) : OL, Drive output value low
• HIGH (0x05) : OH, Drive output value high
• PULL_PWM (0x06) : PP, Drive output as PWM/DAC through pullup/down
• PWM (0x07) : PW, Drive output as PWM/DAC
• FAULT ((1U << 3)) : OF, Fault condition (Rx only), Clear fault (Tx only)

gpio_input - General purpose I/O input states

• NULL (0x00) : NI, GPIO port not available / not installed
• LOW (0x01) : IL, Read value is low
• HIGH (0x02) : IH, Read value is high
• FAULT (0x03) : IF, Fault condition (Rx only), Clear fault (Tx only)

gpio_feature - General purpose I/O feature flags

• ANALOG ((1U << 0)) : Is analog requested

gdl90_event - GDL-90 event Codes

• INVALID (0) : Invalid sequence
• BADCHECKSUM (1) : Checksum invalid
• OTHER (2) : Other event - with raw data
• HEARTBEAT (3) : Heartbeat event
• OWNSHIP (4) : Ownship event (see traffic portion)
• TRAFFIC (5) : Traffic event
• GEOALT (6) : Geo Altitude for Ownship
• UPLINK (7) : Generic Uplink Event

gdl90_emergency - GDL-90 Emergency and priority codes

• NONE (0) : No emergency
• GENERAL (1) : General unspecified emergency
• MEDICAL (2) : Medical emergency
• MINIMUM_FUEL (3) : Minimum fuel
• NORDO (4) : No Communications
• HIJACK (5) : Unlawful interference
• DOWNED (6) : Downed aircraft

gdl90_emitter - GDL-90 Traffic Emitter Category

• NO_INFO (0) : No information available
• LIGHT (1) : Under 15,500 lbs
• SMALL (2) : 15,500 lbs to 75,000 lbs
• LARGE (3) : 75,000 to 300,000 lbs
• HIGH_VORTEX (4) : B757 etc
• HEAVY (5) : Over 300,000 lbs
• MANUEVERABLE (6) : Over 5G acceleration
• ROTORCRAFT (7) : Rotary Wing Aircraft
• GLIDER (9) : Glider or Sailplane
• AIRSHIP (10) : Lighter than air
• SKYDIVER (11) : Sky diver or parachutist
• ULTRALIGHT (12) : Ultralight / Hang Glider
• UAV (14) : Unmanned aircraft
• SPACE (15) : Space / Transatmospheric vehicle
• EMERGENCY (17) : Surface / emergency vehicle
• SERVICE (18) : Surface / service vehicle
• POINTOBSTACLE (19) : Point Obstacle (including tethered balloon)
• CLUSTEROBSTACLE (20) : Cluster of obstacles
• LINEOBSTACLE (21) : Line of obstacles

gdl90_traffic_alert - GDL-90 Traffic Alert Status

• NONE (0) : No alert active for target
• ALERT (1) : Alert active for target

gdl90_traffic_addr - GDL-90 Traffic Address Type

• ADSB_ICAO (0) : ICAO Assigned
• ADSB_SELF (1) : Self Assigned
• TISB_ICAO (2) : ICAO Assigned
• TISB_TRACK_FILE (3) : Track File ID
• SURFACE_VEHICLE (4) : Surface Vehicle
• GROUND_STATION_BEACON (5) : Ground Station Beacon

gdl90_heartbeat_status1 - GDL-90 Heartbeat First Status Byte Bitmask

• GPS_POS_VALID ((1U << 7)) : Position is available for ADS-B Tx
• GDL90_MAINT_REQD ((1U << 6)) : GDL 90 Maintenance is Required
• IDENT_TALKBACK ((1U << 5)) : IDENT Talkback
• ADDR_TALKBACK ((1U << 4)) : Address Type Talkback
• GPS_BATT_LOW ((1U << 3)) : GPS Battery Low
• RATCS ((1U << 2)) : ATC Services Talkback
• UAT_INITIALIZED ((1U << 0)) : GDL90 is initialized

gdl90_heartbeat_status2 - GDL-90 Heartbeat Second Status Byte Bitmask

• CSA_REQUESTED ((1U << 6)) : CSA has been requested
• CSA_NOT_AVAILABLE ((1U << 5)) : CSA not available at this time
• UTC_TIMING_VALID ((1U << 0)) : UTC timing is valid

gdl90_track_status - GDL-90 status of traffic track value

• INVALID (0) : trackheading field is meaningless
• TRUETRACK (1) : trackheading field represents true track
• MAGHDG (2) : trackheading field represents magnetic heading
• TRUEHDG (3) : trackheading field represents true heading

fisb_event - Datalink FIS-B (SRT-047 or DO-358) events

• CNEXRAD (1) : CONUS NEXRAD
• RNEXRAD (2) : Regional NEXRAD
• GENTEXT (3) : Generic Text
• SUA (4) : Special Use Airspace Status
• ICINGLOW (5) : Low Level Forecast Icing Product
• ICINGHIGH (6) : High Level Forecast Icing Product
• TURBLOW (7) : Low Level Forecast Turbulence
• TURBHIGH (8) : High Level Forecast Turbulence
• LIGHTNING (9) : Lightning
• CLOUDTOPS (10) : Cloud Tops
• GAIRMET (11) : Graphical AIRMET Outline
• SIGMETOUTLINE (12) : SIGMET Outline
• SIGMETTEXT (13) : SIGMET Text
• AIRMETOUTLINE (14) : AIRMET Outline
• AIRMETTEXT (15) : AIRMET Text
• NOTAMOUTLINE (16) : NOTAM/TFR Outline
• NOTAMTEXT (17) : NOTAM/TFR Text
• CWAOUTLINE (18) : Center Weather Advisory Outline
• CWATEXT (19) : Center Weather Advisory Text

fisb_geometry - SRT-047/DO-358 datalink FIS-B geometries

• 3DPG_MSL (3) : 3D Polygon MSL Altitude
• 3DPG_AGL (4) : 3D Polygon AGL Altitude
• CP_MSL (7) : Circular Prism MSL Altitude
• CP_AGL (8) : Circular Prism AGL Altitude
• 3DPT_AGL (9) : 3D Point AGL Altitude
• 3DPT_MSL (10) : 3D Point MSL Altitude
• 3DPL_MSL (11) : 3D Polyline MSL Altitude
• 3DPL_AGL (12) : 3D Polyline AGL Altitude

gblock_res - SRT-047/DO-358 Global Block Resolution

• HIGH (1) : High Resolution (1x)
• MEDIUM (5) : Medium Resolution (5x)
• LOW (9) : Low Resolution (9x)

hid_event - Human Interface Device Events

• NONE (0) : No event has occured. Should still be called frequently if no other events happen
• ICC (1) : Inner Counter Clockwise
• IC (2) : Inner Clockwise
• OCC (3) : Outer Counter Clockwise
• OC (4) : Outer Clockwise
• KPUSH (5) : Push on knob
• BPUSH (6) : Button Push
• KREL (7) : Knob Release
• BREL (8) : Button Release

ethertun_dlc - Special data length field parameters for ethernet tunnel of CAN

• TIMESTAMP ((1U << 7)) : Timestamp field present

analog_avg_feature - Features for analog averaging

• NONE (0) : Normal Average
• HEADING (1) : Average range 0-360 with wrapping
• PITCH (2) : Average range -90.0 to 90.0 with wrapping
• ROLL (3) : Average range -180.0 to 180.0 with wrapping

milstd1553 - Maximum sequence number for MIL-STD-1553 over ethernet

• SEQNO_MASK (0x3fff) : Max Sequence number

milstd1553_frame_flag - Frame flags for MIL-STD-1553 frames

• STATUS1 ((1U << 0)) : Status1 is Valid
• STATUS2 ((1U << 1)) : Status2 is Valid
• ADDR1 ((1U << 2)) : Rtaddr1 and Subaddr1 are Valid
• ADDR2 ((1U << 3)) : Rtaddr2 and Subaddr2 are Valid
• MODECODE ((1U << 4)) : Modecode is Valid
• MAILBOX ((1U << 15)) : Treat this message as a mailbox prototype

milstd1553_rtaddr - Remote terminal addresses for MIL-STD-1553

• TRANSMIT ((1U << 7)) : This command has transmit bit set (if not present, receive bit)
• MASK (0x1f) : Mask for station vs flags
• ALL (0x1f) : All Stations
• UNSPEC (0x20) : RT is unspecified

milstd1553_subaddr - Subaddresses for remote terminals for MIL-STD-1553

• MODECODE0 (0x0) : Mode Code (0)
• MODECODE31 (0x1f) : Mode Code (31)
• UNSPEC (0x20) : Subaddress is unspecified

milstd1553_modecode - MIL-STD-1553 special mode codes

• DYNBUSCTRL (0x00) : Dynamic Bus Control
• SYNC (0x01) : Synchronize
• TXSTATW (0x02) : Transmit Status Word
• SELFTEST (0x03) : Initiate Self Test
• TXSD (0x04) : Transmitter Shutdown
• OVTXSD (0x05) : Override Transmitter Shutdown
• INHIBIT (0x06) : Inhibit Terminal Flag
• OVINHIBIT (0x07) : Override Inhibit Terminal Flag
• RESET (0x08) : Reset Remote Terminal
• TXVECTW (0x10) : Transmit Vector Word
• SYNCWDATA (0x11) : Synchronize (with Data) (R)
• TXLASTCW (0x12) : Transmit Last Command Word
• TXBITW (0x13) : Transmit BIT Word
• SELTXSD (0x14) : Selected Transmitter Shutdown (R)
• OVSELTXSD (0x15) : Override Selected Transmitter Shutdown (R)
• UNSPEC (0x20) : Mode code is unspecified

milstd1553_status - MIL-STD-1553 status bits

• RTMASK (0x1f) : Mask for station vs flags
• MSGERROR ((1U << 15)) : Message Error
• INSTRMNT ((1U << 14)) : Instrumentation
• SVCREQ ((1U << 13)) : Service Request
• BRDCSTRX ((1U << 9)) : Broadcast Received
• BUSY ((1U << 8)) : Busy
• SUBSYSFLAG ((1U << 7)) : Subsystem Flag
• DYNBUSCTRLAC ((1U << 6)) : Dynamic Bus Control Accept
• TERMFLAG ((1U << 5)) : Terminal Flag

arinc429_speed - ARINC-429 baud rates

• FAST (100000) : ARINC-429 High Speed
• SLOW (12500) : ARINC-429 Low Speed

arinc429_bcd - ARINC-429 Binary Coded Decimal

• PLUS ((0 << 29)) : SSM Positive Number
• NCD ((1 << 29)) : SSM No Computed Data
• FT ((2 << 29)) : SSM Functional Test
• MINUS ((3 << 29)) : SSM Negative Number

arinc429_dd - ARINC-429 Discrete Data

• NORM ((0 << 29)) : SSM Normal Operation
• NCD ((1 << 29)) : SSM No Computed Data
• FT ((2 << 29)) : SSM Functional Test
• FAIL ((3 << 29)) : SSM Failure Warning

arinc429_bnr - ARINC-429 Binary Number

• FAIL ((0 << 29)) : SSM Failure Warning
• NCD ((1 << 29)) : SSM No Computed Data
• FT ((2 << 29)) : SSM Functional Test
• NORM ((3 << 29)) : SSM Normal Operation
• PLUS ((0 << 28)) : SM Positive Number
• MINUS ((1 << 28)) : SM Negative Number

canaero_datatype - CANAERO datatypes and encodings

• NODATA (0) : No data type
• ERROR (1) : Emergency event data type
• FLOAT (2) : Single precision IEE-754
• LONG (3) : 2's complement integer
• ULONG (4) : Unsigned integer
• BLONG (5) : Collection of 32 individual bits
• SHORT (6) : 2's complement short integer
• USHORT (7) : Unsigned 16-bit integer
• BSHORT (8) : Collection of 16 individual bits
• CHAR (9) : 2's complement char integer
• UCHAR (10) : unsigned 8-bit integer
• BCHAR (11) : Collection of 8 individual bits
• SHORT2 (12) : 2 x 2's complement short integer
• USHORT2 (13) : 2 x unsigned 16-bit integer
• BSHORT2 (14) : 2 x collection of 16 individual bits
• CHAR4 (15) : 4 x 2's complement char integer
• UCHAR4 (16) : 4 x unsigned 8-bit
• BCHAR4 (17) : 4 x collection of 8 individual bits
• CHAR2 (18) : 2 x 2's complement char integer
• UCHAR2 (19) : 2 x unsigned 8-bit integer
• BCHAR2 (20) : 2 x collection of 8 individual bits
• MEMID (21) : Memory ID for upload/download
• CHKSUM (22) : Checksum for upload/download
• ACHAR (23) : ASCII Character
• ACHAR2 (24) : 2x ASCII Character
• ACHAR4 (25) : 4x ASCII Character
• VARIABLE3 (100) : 17 to 24-bits of signed 2's complement integer
• UVARIABLE3 (101) : 17 to 24-bits of unsigned integer

parambuf_interpflag - Parameter buffer interpretation flags

• NONE (0) : No interpretation flags
• STRICT ((1U << 0)) : Confidence must exactly match minconfidence
• CROSSFILL ((1U << 1)) : Crossfill equivalent values from appropriate better scoring peers
• PROMISC ((1U << 2)) : Interpret from all sources and do not attach to a single one
• OPTIONAL ((1U << 3)) : The presence of this parameter is not required for normal operation

parambuf_flag - Parameter buffer state flags

• NONE (0) : No flags
• VALID ((1U << 0)) : Set to true by receive logic when paramter buffer is valid
• UPDATED ((1U << 1)) : Set by receive logic when paramter buffer has been updated
• LINKED ((1U << 2)) : When this flag is set, this parameter buffer has been linked in a parameter set

serial_dbits - Serial Data Bits

• DB8 (0) : Eight Data Bits
• DB7 (1) : Seven Data Bits

serial_parity - Serial Data Parity

• NONE (0) : No Parity Bit
• ODD (1) : Odd Parity Bit
• EVEN (2) : Even Parity Bit

serial_sbits - Serial Stop Bits

• SB1 (0) : One Stop Bit
• SB2 (1) : Two Stop Bits

link_state - Serial Interface Link State

• DISCONNECTED (-1) : Interface is currently not connected
• STATELESS (0) : Interface does not track state
• CONNECTED (1) : Interface is currently connected

object_factory_flag - Object Factory Flags

• VIRTUAL ((1 << 0)) : Virtual objects cannot be directly instantiated -- only their non-virtual children
• OSSPECIFIC ((1 << 1)) : Objects defined within the operating system abstraction may be absent or have different parameters on other O/S selections
• OPTIONAL ((1 << 2)) : Optional object factories can be ignored if their parent object types have no registered factory
• REGISTERED ((1 << 3)) : If present, this object factory has been registered within the list of valid object types
• FOUNDLINEAGE ((1 << 4)) : If present, this object factory has found its full lineage up to the root OBJECT parent

scb_flag - Software Circuit Breaker Flags

• NONE (0) : Application running within normal paramters
• HIGHMEM ((1 << 0)) : Application has used unexpectedly high portion of memory
• HIGHCPU ((1 << 1)) : Application has used unexpectedly high portion of CPU
• HIGHBW ((1 << 2)) : Application has used unexpectedly high portion of network bandwidth

priv_proto - Privacy Protocols

• NONE (0) : No privacy protocol
• DES (1) : Data Encryption Standard
• AES (2) : 128-Bit Advanced Encryption Standard
• AES192 (3) : 192-Bit Advanced Encryption Standard
• AES256 (4) : 256-Bit Advanced Encryption Standard

crc16_poly - CRC-16 Polynomials

• POSTXOR ((1 << 16)) : XOR Block data after table lookup rather than before (nonstandard for GDL-90)
• CCITT (0x1021) : GDL-90 (when in conjunction with POSTXOR flag), CRC-16 CCITT
• ANSI (0x8005) : ANSI X3.28, USB, MODBUS and others

a661_widgetid - ARINC-661 Widget IDs

• NOWIDGET (0) : No selected widget

a661_layerid - ARINC-661 Layer IDs

a661_color - ARINC-661 Color Indices

a661 - ARINC-661 Special Values

• FALSE (0x00) : False
• TRUE (0x01) : True
• UNSELECTED (0x00) : Not selected
• SELECTED (0x01) : Selected
• TRUE_WITH_VALIDATION (0x02) : True and Validated
• BEGIN_BLOCK (0xB0) : Start keyword opening a runtime block of information
• END_BLOCK (0xD0) : Keyword ending a block of runtime information
• CMD_SET_PARAMETER (0xCA02) : Set a parameter on a widget
• CMD_UA_REQUEST (0xCA03) : Set parameter
• NOTIFY_WIDGET_EVENT (0xCC01) : Received Widget Event
• NOTIFY_LAYER_EVENT (0xCC02) : Received Layer Event
• NOTIFY_EXCEPTION (0xCC03) : Received Exception Event
• REQ_LAYER_ACTIVE (0xDA01) : Request a layer become active
• REQ_LAYER_INACTIVE (0xDA02) : Request a layer become inactive
• REQ_LAYER_VISIBLE (0xDA04) : Request a layer become the visible layer
• REQ_CURSOR_ON_WIDGET (0xDA05) : Request cursor be snapped to a widget
• REQ_FOCUS_ON_WIDGET (0xDA03) : Request focus be snapped to a widget
• ERR_BAD_COMMAND (0xF001) : Erroneous command
• ERR_PROCESS_OVERLOAD (0xF006) : Inability to complete processing
• ERR_RENDERING_OVERLOAD (0xF007) : Inability to complete rendering
• ERR_SET_ABORTED (0xF003) : Erroneous set command
• ERR_UA_REQUEST_ABORTED (0xF004) : Erroneous UA Request
• NOTE_CYCLIC_ACTIVATION (0xDC82) : Periodic Indication that Layer is Active
• NOTE_LAYER_IS_ACTIVE (0xDC02) : Layer Activated by CDS and Reinitialize Data
• NOTE_LAYER_IS_INACTIVE (0xDC03) : Layer Deactivated by CDS
• NOTE_REINIT_LAYER_DATA (0xDC01) : CDS Requests Data Layer Initialization
• NOTE_CONNECTOR_DATA (0xDC86) : Parametric Data Update
• EVT_ANIMATION_STATUS_CHANGE (0xE509) : Animation Status has completed (1 byte)
• EVT_CLICKED (0xE1D1) : Item has been clicked
• EVT_CURSOR_ENTER (0xE300) : Cursor enters active area
• EVT_CURSOR_EVENT (0xE305) : Event from cursor event extension
• EVT_CURSOR_EXIT (0xE320) : Cursor exits active area
• EVT_CURSOR_INSIDE (0xE310) : Cursor inside active area
• EVT_CURSOR_POS_CHANGE (0xE010) : Cursor position has changed
• EVT_GESTURE_DIR_FLICK (0xE508) : Direction of one or more points quickly moved in a direction
• EVT_DOUBLE_CLICKED (0xE1D2) : Double click event
• EVT_GESTURE_DRAG (0xE506) : One or more points move in a direction
• EVT_EDITBOX_OPENED (0xE110) : Edit box has been opened for entry
• EVT_FIRST_VIS_ENTRY_CHANGE (0xE020) : First visible entry in a list has changed
• EVT_GESTURE_FLICK (0xE507) : Velocity of one or more points quickly moved in a direction
• EVT_FRAME_POS_CHANGE (0xE030) : Change in X/Y Position of Frame
• EVT_GESTURE_DOUBLE_TAP (0xE502) : Two taps in quick succession and close proximity
• EVT_GESTURE_TAP (0xE501) : Single tap and release
• EVT_INCREMENT (0xE006) : Device Increment
• EVT_ITEM_SYNCHRONIZATION (0xE150) : Map Item Synchronization
• EVT_ITEM_IN_BOUNDS (0xE141) : List of in-bounds map items
• EVT_ITEM_OUT_OF_BOUNDS (0xE140) : List of out-of-bounds map items
• EVT_KEY (0xE005) : Virtual Keyboard KeyPress
• EVT_MULT_SELECTION (0xE058) : Multiple entry list (extension) selection entry
• EVT_OFFSCREEN (0xE0E0) : Map element has gone off screen
• EVT_ONSCREEN (0xE0E1) : Map element has come on screen
• EVT_GESTURE_PINCH (0xE504) : Pinch Gesture
• EVT_POPUP_CLOSED (0xE040) : Popup menu or button closed
• EVT_POPUP_PANEL_CLOSED (0xE120) : Popup panel closed
• EVT_GESTURE_PRESS_AND_HOLD (0xE503) : Area pressed and held
• EVT_PRESSED (0xE1D3) : Area pressed
• EVT_RELEASED (0xE1D4) : Area released
• EVT_RIGHT_CLICKED (0xE1D5) : Area right clicked
• EVT_GESTURE_ROTATE (0xE505) : Rotation gesture
• EVT_SEL_ENTRY_CHANGE (0xE050) : Selection entry has changed
• EVT_SELECTION (0xE060) : Item has been selected
• EVT_SELECTION_MAP (0xE068) : Map location has been selected
• EVT_STATE_CHANGE (0xE070) : Item state has changed
• EVT_STRING_CHANGE (0xE080) : String value has been changed but not confirmed or aborted
• EVT_STRING_CHANGE_ABORTED (0xE090) : String value change has been canceled
• EVT_STRING_CONFIRMED (0xE0A0) : String value change has been confirmed
• EVT_TABBED_PANEL_CHANGE (0xE0B0) : Selected tabbed panel has changed
• EVT_TOUCH (0xE500) : A touch has taken place
• EVT_VALUE_CHANGE (0xE0C0) : Slider value has changed
• EVT_VISIBLE_CHILD (0xE0D0) : Visible child within paging container has changed
• EVT_VISIBLE_CHILD_INDEX (0xE0D1) : Index of visible child within paging container has changed
• EVT_WATCHDOG_EXPIRED (0xE200) : Watchdog has expired
• EVT_WATCHDOG_NORMAL (0xE210) : Watchdog status is normal
• EVT_ANY (0xFFFF) : XFS-Specific Any Event
• STRING (0xB490) : String value parameter
• STRING_ARRAY (0xB4A0) : Collection of NUL-separated and terminated string values parameter
• SELECTED_ENTRY (0xB430) : Selected entry within a list
• NUMBER_OF_ENTRIES (0xB2A0) : Number of entries within a list
• VISIBLE_CHILD (0xB540) : Visible child page/mutex container
• ENTRY_VALID (0xB570) : Entry has been validated when non-zero
• COLOR_INDEX (0xB160) : Index of Color to be used for border
• FILL_INDEX (0xB1E0) : Index of Color to be used for fill
• ENABLE (0xB180) : Enable for interaction
• VALUE (0xB520) : Floating Point Numeric Value
• START_ANGLE (0xB480) : 32-bit signed numeric value for starting angle
• END_ANGLE (0xB1B0) : 32-bit signed numeric value for ending angle
• VISIBLE (0xB530) : Is widget visible
• INNER_STATE_CHECK (0xB244) : Is toggle checked
• INNER_STATE_TOGGLE (0xB258) : Is toggle selected
• EN_DEFSTR (0xBA11) : Collins Extension for Edit Number to show default string
• SIZE_X (0xB450) : Width of widget
• SIZE_Y (0xB460) : Height of widget

com_secmode - Communication Security Mode

• TD (1) : TD
• PT (2) : Plain Text
• CT (7) : Cypher Text
• INVALID (8) : Invalid Reserved
• RV (14) : RV

com_band - Communication Band

• UNKNOWN (0) : Unknown communication band
• VHFFM (1) : Very High Frequency with Frequency Modulation
• VHFAM (2) : Very High Frequency Amplitude Modulation
• UHFFM (3) : Ultra High Frequency
• UHFAM (4) : Ultra High Frequency
• P25A (5) : Project 25 Analog
• P25D (6) : Project 25 Digital
• P25T (7) : Project 25 Trunk Mode
• TSM (8) : Trellisware Scalable Mobile Ad-hoc NETworking
• SATCOM (9) : Satellite Communication
• SINCGARS (10) : SINCGARS Frequency Hop Frequencies
• HFAM (11) : High Frequency Ampltitude Modulation

com_bandmask - Supported Communication Band Mask

• VHFFM ((1 << 0)) : Very High Frequency with Frequency Modulation
• VHFAM ((1 << 1)) : Very High Frequency with Amplitude Modulation
• UHFFM ((1 << 2)) : Ultra High Frequency with Frequency Modulation
• UHFAM ((1 << 3)) : Ultra High Frequency with Amplitude Modulation
• P25A ((1 << 4)) : Project 25 Analog
• P25D ((1 << 5)) : Project 25 Digital
• P25T ((1 << 6)) : Project 25 Trunk Mode
• TSM ((1 << 7)) : Trellisware Scalable Mobile Ad-hoc NETworking
• SATCOM ((1 << 8)) : Satellite Communication
• SINCGARS ((1 << 9)) : SINCGARS Frequency Hop Frequencies
• HFAM ((1 << 10)) : High Frequency

com_sqlmode - Communication Squelch Mode

• UNKNOWN (0) : Unknown Squelch Mode
• NONE (1) : Squelch Off
• SNR (2) : Signal to Noise Ratio
• TONE (3) : FM Military Tone Squelch System
• CTCSS (4) : Continuous Tone Coded Squelch System
• DCS (5) : Digital Code Squelch
• NAC (6) : Network Access Code P25 Trunk Mode

com_scgopmode - SINCGARS Operational Mode

• UNKNOWN (0) : Unknown SINCGARS Mode
• SINGLECHANNEL (1) : Single channel mode is active
• FREQHOP (2) : Frequency hoping is active
• FREQHOPMASTER (3) : Frequency hop and is master

percent - Percentage Value

graphic_prim - Graphic Primative

• POINTS (0) : Vertices in space
• LINES (1) : Lines between pairs of vertices
• LINE_LOOP (2) : Connect all vertices into a closed loop
• LINE_STRIP (3) : Connect all vertices into a single line
• TRIANGLES (4) : Triangles between sets of three vertices
• TRIANGLE_STRIP (5) : Connect all vertices into a single strip of triangles
• TRIANGLE_FAN (6) : Connect all vertices into a fan of triangles

Parameter Types This section declares the initial set of XSEDE parameters. Each parameter is defined by a name and a short description. This is followed by the numeric parameter ID. Next, the meanings of the unit and subunit fields are provided, if applicable. and finally the parameter data format and a reference to the appropriate table defining the parameter attribute type.

GOAROUND - Go around requested

• Parameter ID: %x00.00.00
• Unit Usage: None
• SubUnit Usage: None
• Format: BOOL (See .)
• Range: There SHALL NOT be a Range Parameter for this parameter.

P-ALT - Pressure Altitude

• Parameter ID: %x00.00.01
• Unit Usage: Source ID
• SubUnit Usage: None
• Format: SINT (See .)
• Range: There SHALL NOT be a Range Parameter for this parameter.
• Units: FT multiplied by 10.

T-ALT - True Altitude

• Parameter ID: %x00.00.02
• Unit Usage: Source ID
• SubUnit Usage: None
• Format: SINT (See .)
• Range: There SHALL be a Range Parameter for this parameter.
• Units: FT multiplied by 10.

IAS - Indicated Airspeed

• Parameter ID: %x00.00.03
• Unit Usage: Source ID
• SubUnit Usage: None
• Format: SINT (See .)
• Range: There SHALL be a Range Parameter for this parameter.
• Units: KT multiplied by 100.

CAS - Calibrated Airspeed

• Parameter ID: %x00.00.04
• Unit Usage: Source ID
• SubUnit Usage: None
• Format: SINT (See .)
• Range: There SHALL be a Range Parameter for this parameter.
• Units: KT multiplied by 100.

CASMSG - Crew Alerting System Message

• Parameter ID: %x00.00.05
• Unit Usage: CAS System ID
• SubUnit Usage: None
• Format: CASMSG (See .)
• Range: There SHALL NOT be a Range Parameter for this parameter.

THROTPOS - Throttle position

• Parameter ID: %x00.00.06
• Unit Usage: None
• SubUnit Usage: None
• Format: SINT (See .)
• Range: There SHALL be a Range Parameter for this parameter.
• Default Range: SERVO (See .)

INAIR - Are we in the air (vs. on the ground)

• Parameter ID: %x00.00.07
• Unit Usage: None
• SubUnit Usage: None
• Format: BOOL (See .)
• Range: There SHALL NOT be a Range Parameter for this parameter.

BARO - Current barometric setting

• Parameter ID: %x00.00.08
• Unit Usage: None
• SubUnit Usage: None
• Format: UINT (See .)
• Range: There SHALL be a Range Parameter for this parameter.
• Units: INHG multiplied by 1000.

CLTPOS - Collective Position

• Parameter ID: %x00.00.09
• Unit Usage: None
• SubUnit Usage: None
• Format: SINT (See .)
• Range: There SHALL NOT be a Range Parameter for this parameter.
• Default Range: SERVO (See .)

CLTPOSREQ - A/P Requested Collective Position

• Parameter ID: %x00.00.0a
• Unit Usage: None
• SubUnit Usage: None
• Format: SERVO (See .)
• Range: There SHALL NOT be a Range Parameter for this parameter.

MAGHDG - Magnetic Heading

• Parameter ID: %x00.00.0b
• Unit Usage: Source ID
• SubUnit Usage: None
• Format: UINT (See .)
• Range: There SHALL NOT be a Range Parameter for this parameter.
• Default Range: HDG (See .)
• Units: DEG multiplied by 100.

MAGCRS - Magnetic Course (via RNAV)

• Parameter ID: %x00.00.0c
• Unit Usage: Source ID
• SubUnit Usage: None
• Format: UINT (See .)
• Range: There SHALL NOT be a Range Parameter for this parameter.
• Default Range: HDG (See .)
• Units: DEG multiplied by 100.

TRUECRS - True Course (via RNAV)

• Parameter ID: %x00.00.0d
• Unit Usage: Source ID
• SubUnit Usage: None
• Format: UINT (See .)
• Range: There SHALL NOT be a Range Parameter for this parameter.
• Default Range: HDG (See .)
• Units: DEG multiplied by 100.

MAGDTK - Desired Course (via RNAV)

• Parameter ID: %x00.00.0e
• Unit Usage: Source ID
• SubUnit Usage: None
• Format: UINT (See .)
• Range: There SHALL NOT be a Range Parameter for this parameter.
• Default Range: HDG (See .)
• Units: DEG multiplied by 100.

TRUEDTK - Desired course (via RNAV)

• Parameter ID: %x00.00.0f
• Unit Usage: Source ID
• SubUnit Usage: None
• Format: UINT (See .)
• Range: There SHALL NOT be a Range Parameter for this parameter.
• Default Range: HDG (See .)
• Units: DEG multiplied by 100.

LAT - Current position latitude

• Parameter ID: %x00.00.10
• Unit Usage: Source ID
• SubUnit Usage: None
• Format: SINT (See .)
• Range: There SHALL NOT be a Range Parameter for this parameter.
• Units: DEG multiplied by 10000000.

LON - Current position longitude

• Parameter ID: %x00.00.11
• Unit Usage: Source ID
• SubUnit Usage: None
• Format: SINT (See .)
• Range: There SHALL NOT be a Range Parameter for this parameter.
• Units: DEG multiplied by 10000000.

RNAVALT - Altitude measured by RNAV

• Parameter ID: %x00.00.12
• Unit Usage: Source ID
• SubUnit Usage: None
• Format: SINT (See .)
• Range: There SHALL NOT be a Range Parameter for this parameter.
• Units: FT multiplied by 10.

ROLL - Current degrees of roll, -18000 being being upside down towards left, 18000 being upside down to the right

• Parameter ID: %x00.00.13
• Unit Usage: Source ID
• SubUnit Usage: None
• Format: SINT (See .)
• Range: There SHALL be a Range Parameter for this parameter.
• Default Range: ROLL (See .)
• Units: DEG multiplied by 100.

PITCH - Current degrees of pitch, 9000 being straight up, -9000 being straight down

• Parameter ID: %x00.00.14
• Unit Usage: Source ID
• SubUnit Usage: None
• Format: SINT (See .)
• Range: There SHALL be a Range Parameter for this parameter.
• Default Range: PITCH (See .)
• Units: DEG.

YAW - Yaw/Inclination as measured in G force

• Parameter ID: %x00.00.15
• Unit Usage: Source ID
• SubUnit Usage: None
• Format: SINT (See .)
• Range: There SHALL NOT be a Range Parameter for this parameter.
• Units: G multiplied by 10000.

FUELWTTOT - Computed remaining fuel

• Parameter ID: %x00.00.16
• Unit Usage: Fuel System ID/0=Sum of all
• SubUnit Usage: 0 = current total, 1 = total at end of flight
• Format: SINT (See .)
• Range: There SHALL NOT be a Range Parameter for this parameter.
• Units: LB multiplied by 100.

RNAVHFOM - Horizontal Figure of Merit

• Parameter ID: %x00.00.17
• Unit Usage: Source ID
• SubUnit Usage: None
• Format: UINT (See .)
• Range: There SHALL NOT be a Range Parameter for this parameter.
• Units: M multiplied by 100.

RNAVVFOM - Vertical Figure of Merit

• Parameter ID: %x00.00.18
• Unit Usage: Source ID
• SubUnit Usage: None
• Format: UINT (See .)
• Range: There SHALL NOT be a Range Parameter for this parameter.
• Units: M multiplied by 100.

RNAVHPL - Horizontal Protection Level

• Parameter ID: %x00.00.19
• Unit Usage: Source ID
• SubUnit Usage: None
• Format: UINT (See .)
• Range: There SHALL NOT be a Range Parameter for this parameter.
• Units: M multiplied by 100.

RNAVVPL - Vertical Protection Level

• Parameter ID: %x00.00.1a
• Unit Usage: Source ID
• SubUnit Usage: None
• Format: UINT (See .)
• Range: There SHALL NOT be a Range Parameter for this parameter.
• Units: M multiplied by 100.

IASRT - Indicated Airspeed Rate of Change

• Parameter ID: %x00.00.1b
• Unit Usage: Source ID
• SubUnit Usage: None
• Format: SINT (See .)
• Range: There SHALL NOT be a Range Parameter for this parameter.
• Units: KTPS multiplied by 100.

KBDSEL - Activate the named on-screen keyboard or none if empty

• Parameter ID: %x00.00.1c
• Unit Usage: Display
• SubUnit Usage: None
• Format: STRING (See .)
• Range: There SHALL NOT be a Range Parameter for this parameter.

KEYPRESS - Send the FMS encoded key press to the given display

• Parameter ID: %x00.00.1d
• Unit Usage: Display
• SubUnit Usage: None
• Format: UINT (See .)
• Range: There SHALL NOT be a Range Parameter for this parameter.
• Values interpreted using osk_key dictionary (See .)

, below, shows the values defined in the osk-key Dictionary. These options represent the On screen keyboard keys. osk-key Dictionary

Name	Value	Definition
0	%d48	Character 0
1	%d49	Character 1
2	%d50	Character 2
3	%d51	Character 3
4	%d52	Character 4
5	%d53	Character 5
6	%d54	Character 6
7	%d55	Character 7
8	%d56	Character 8
9	%d57	Character 9
A	%d65	Character A
B	%d66	Character B
C	%d67	Character C
D	%d68	Character D
E	%d69	Character E
F	%d70	Character F
G	%d71	Character G
H	%d72	Character H
I	%d73	Character I
J	%d74	Character J
K	%d75	Character K
L	%d76	Character L
M	%d77	Character M
N	%d78	Character N
O	%d79	Character O
P	%d80	Character P
Q	%d81	Character Q
R	%d82	Character R
S	%d83	Character S
T	%d84	Character T
U	%d85	Character U
V	%d86	Character V
W	%d87	Character W
X	%d88	Character X
Y	%d89	Character Y
Z	%d90	Character Z
PREV	%d60	Previous position or <
NEXT	%d62	Next position or >
DEG	%d127	Degrees
DIRECTTO	%d128	Direct To
ENT	%d129	Enter

SURFPOS - Position of arbitrary control surface

• Parameter ID: %x00.00.1e
• Unit Usage: Surface Type
• SubUnit Usage: Surface Type Subassembly
• Format: SINT (See .)
• Range: There SHALL be a Range Parameter for this parameter.
• Default Range: SERVO (See .)

SURFREQ - Requested control surface position

• Parameter ID: %x00.00.1f
• Unit Usage: Surface Type
• SubUnit Usage: Surface Type Subassembly
• Format: SINT (See .)
• Range: There SHALL NOT be a Range Parameter for this parameter.
• Default Range: SERVO (See .)

SURFTORQUE - Aerodynamic torque applied to a control surface relative to movement

• Parameter ID: %x00.00.20
• Unit Usage: Surface Type
• SubUnit Usage: Surface Type Subassembly
• Format: SINT (See .)
• Range: There SHALL NOT be a Range Parameter for this parameter.
• Units: LBFT multiplied by 100.

SURFFORCE - Aerodynamic force applied to a control surface relative to movement

• Parameter ID: %x00.00.21
• Unit Usage: Surface Type
• SubUnit Usage: Surface Type Subassembly
• Format: SINT (See .)
• Range: There SHALL NOT be a Range Parameter for this parameter.
• Units: LB multiplied by 100.

WINDSPD - Wind Speed

• Parameter ID: %x00.00.22
• Unit Usage: Source ID
• SubUnit Usage: None
• Format: UINT (See .)
• Range: There SHALL NOT be a Range Parameter for this parameter.
• Units: KT multiplied by 100.

WINDBRG - True Bearing from which wind blows

• Parameter ID: %x00.00.23
• Unit Usage: Source ID
• SubUnit Usage: None
• Format: UINT (See .)
• Range: There SHALL NOT be a Range Parameter for this parameter.
• Default Range: HDG (See .)
• Units: DEG multiplied by 100.

COMFREQ - Communication Frequency - If SYS/USERSEL, sets COMFREQTX and COMFREQRX. RAW should match COMFREQTX.

• Parameter ID: %x00.00.24
• Unit Usage: Radio ID
• SubUnit Usage: 0=Radio/1+=Presets
• Format: UINT (See .)
• Range: There SHALL NOT be a Range Parameter for this parameter.
• Default Range: COMFREQ (See .)
• Units: MHZ multiplied by 100000.

COMFREQR - Range of acceptable communication frequencies

• Parameter ID: %x00.00.24
• Unit Usage: Radio ID
• SubUnit Usage: 0=Current Band/1+=By COM Band
• Format: RANGE (See .)
• Range: There SHALL NOT be a Range Parameter for this parameter.

NAVFREQ - Navigation Frequency

• Parameter ID: %x00.00.25
• Unit Usage: Radio ID
• SubUnit Usage: 0=Radio/1+=Presets
• Format: UINT (See .)
• Range: There SHALL be a Range Parameter for this parameter.
• Default Range: NAVFREQ (See .)
• Units: MHZ multiplied by 100000.

COMVOL - Communication Volume (0-100)

• Parameter ID: %x00.00.26
• Unit Usage: Radio ID
• SubUnit Usage: None
• Format: UINT (See .)
• Range: There SHALL NOT be a Range Parameter for this parameter.
• Default Range: PERCENT (See .)
• Units: PCENT.

NAVVOL - Communication Volume (0-100)

• Parameter ID: %x00.00.27
• Unit Usage: Radio ID
• SubUnit Usage: None
• Format: UINT (See .)
• Range: There SHALL NOT be a Range Parameter for this parameter.
• Default Range: PERCENT (See .)
• Units: PCENT.

COMSQL - Communication Squelch (0-100)

• Parameter ID: %x00.00.28
• Unit Usage: Radio ID
• SubUnit Usage: None
• Format: UINT (See .)
• Range: There SHALL NOT be a Range Parameter for this parameter.
• Default Range: PERCENT (See .)
• Units: PCENT.

MUX - Selected multiplexer input or output

• Parameter ID: %x00.29
• Unit Usage: MUX ID
• SubUnit Usage: None
• Format: UINT (See .)
• Range: There SHALL NOT be a Range Parameter for this parameter.

ICSVOL - Intercom Volume (0-100)

• Parameter ID: %x00.00.2a
• Unit Usage: Audio Panel Unit
• SubUnit Usage: 0=System, 1=Pilot, 2=Copilot, rest are pax
• Format: UINT (See .)
• Range: There SHALL NOT be a Range Parameter for this parameter.
• Default Range: PERCENT (See .)
• Units: PCENT.

COMSTATE - COM radio state

• Parameter ID: %x00.00.2b
• Unit Usage: Radio ID
• SubUnit Usage: None
• Format: UINT (See .)
• Range: There SHALL NOT be a Range Parameter for this parameter.
• Values interpreted using com_state dictionary (See .)

, below, shows the values defined in the com-state Dictionary. These options represent the State of communication radio. com-state Dictionary

Name	Value	Definition
IDLE	R	Ready to Receive (Idle)
RX	r	Active receiving
TX	T	Active transmitting
STUCK	S	Stuck Mic
FAULT	F	Fault

ICSRXCOMS - Which COM Radios to Monitor (mask)

• Parameter ID: %x00.00.2c
• Unit Usage: Audio Panel Unit
• SubUnit Usage: 0=System, 1=Pilot, 2=Copilot, rest are pax
• Format: UINT (See .)
• Range: There SHALL NOT be a Range Parameter for this parameter.

ICSRXNAVS - Which NAV Radios to Monitor (mask)

• Parameter ID: %x00.00.2d
• Unit Usage: Audio Panel Unit
• SubUnit Usage: 0=System, 1=Pilot, 2=Copilot, rest are pax
• Format: UINT (See .)
• Range: There SHALL NOT be a Range Parameter for this parameter.

ICSMODE - Intercom Mode

• Parameter ID: %x00.00.2e
• Unit Usage: None
• SubUnit Usage: None
• Format: UINT (See .)
• Range: There SHALL NOT be a Range Parameter for this parameter.
• Values interpreted using ics_mode dictionary (See .)

, below, shows the values defined in the ics-mode Dictionary. These options represent the State of intercom system. ics-mode Dictionary

Name	Value	Definition
PILOT	P	Pilot Isolate
CREW	C	Crew Isolate
ALL	A	All
FEATUREMASK	%xff.00	Mask for intercom features
POSITIONAL	%x01.00	Positional dynamic audio

ICSTXCOMS - Which COM Radios to Transmit (mask)

• Parameter ID: %x00.00.2f
• Unit Usage: Audio Panel Unit
• SubUnit Usage: 0=System, 1=Pilot, 2=Copilot, rest are pax
• Format: UINT (See .)
• Range: There SHALL NOT be a Range Parameter for this parameter.

DATETIME - Date and Time

• Parameter ID: %x00.00.30
• Unit Usage: 0=Current Zulu Time
• SubUnit Usage: None
• Format: DATETIME (See .)
• Range: There SHALL NOT be a Range Parameter for this parameter.

GLOAD - Current Normal to Aircraft Loading

• Parameter ID: %x00.00.31
• Unit Usage: Source ID
• SubUnit Usage: None
• Format: SINT (See .)
• Range: There SHALL be a Range Parameter for this parameter.
• Units: G multiplied by 1000.

RATEOFTURN - Turn Coordinator Rate Per Second

• Parameter ID: %x00.00.32
• Unit Usage: Source ID
• SubUnit Usage: None
• Format: SINT (See .)
• Range: There SHALL NOT be a Range Parameter for this parameter.
• Units: DEG multiplied by 1000.

GROUNDSPEED - Groundspeed

• Parameter ID: %x00.00.33
• Unit Usage: Source ID
• SubUnit Usage: None
• Format: UINT (See .)
• Range: There SHALL NOT be a Range Parameter for this parameter.
• Units: KT multiplied by 100.

VSPEED - Vertical speed

• Parameter ID: %x00.00.34
• Unit Usage: Source ID
• SubUnit Usage: None
• Format: SINT (See .)
• Range: There SHALL NOT be a Range Parameter for this parameter.
• Units: FPM multiplied by 1.

XPDRIDENT - XPDR Ident request (USERSELECT only). Non-standby transponders must IDENT regardless of UNIT. Used only to request IDENT, but IDENT state reported in XPDRMODE

• Parameter ID: %x00.00.35
• Unit Usage: Always zero
• SubUnit Usage: None
• Format: BOOL (See .)
• Range: There SHALL NOT be a Range Parameter for this parameter.

XPDRRPS - XPDR Replies per second (normalized)

• Parameter ID: %x00.00.36
• Unit Usage: XPDR ID
• SubUnit Usage: None
• Format: UINT (See .)
• Range: There SHALL NOT be a Range Parameter for this parameter.

XPDRSQUAWK - XPDR Squawk in octal. All transponders must change SQUAWK regardless of UNIT

• Parameter ID: %x00.00.37
• Unit Usage: XPDR ID (Rx Only) Zero for USERSELECT
• SubUnit Usage: None
• Format: UINT (See .)
• Range: There SHALL NOT be a Range Parameter for this parameter.
• Values interpreted using octal dictionary (See .)

, below, shows the values defined in the octal Dictionary. These options represent the Octal representation. octal Dictionary

Name	Value	Definition
octal	N/A	Octal representation

XPDRMODE - XPDR Mode. Note that IDENT flag is ignored in USERSELECT condition.

• Parameter ID: %x00.00.38
• Unit Usage: XPDR ID
• SubUnit Usage: None
• Format: UINT (See .)
• Range: There SHALL NOT be a Range Parameter for this parameter.
• Values interpreted using xpdr_mode dictionary (See .)

, below, shows the values defined in the xpdr-mode Dictionary. These options represent the Transponder mode and flags. xpdr-mode Dictionary

Name	Value	Definition
UNKNOWN	%d0	Unknown
MODEMASK	%x7f	Mask for mode
STANDBY	O	Standby
GND	G	On Ground
AIR	A	Air/Altitude Reporting
FLAG-IDENT	%x80	IDENT Active

NAVOBS - NAV OBS Value

• Parameter ID: %x00.00.39
• Unit Usage: Radio/FMS ID
• SubUnit Usage: None
• Format: UINT (See .)
• Range: There SHALL NOT be a Range Parameter for this parameter.
• Default Range: OBS (See .)
• Units: DEG multiplied by 1000.

NAVBRG - Bearing to nav aid

• Parameter ID: %x00.00.3a
• Unit Usage: Radio/FMS ID
• SubUnit Usage: None
• Format: UINT (See .)
• Range: There SHALL NOT be a Range Parameter for this parameter.
• Default Range: HDG (See .)
• Units: DEG multiplied by 100.

NAVCDI - Course Deviation (-1000 to 1000)

• Parameter ID: %x00.00.3b
• Unit Usage: Radio/FMS ID
• SubUnit Usage: None
• Format: SINT (See .)
• Range: There SHALL NOT be a Range Parameter for this parameter.
• Default Range: DEVIATION (See .)

NAVGSI - Glide Slope (-1000 to 1000)

• Parameter ID: %x00.00.3c
• Unit Usage: Radio/FMS ID
• SubUnit Usage: None
• Format: SINT (See .)
• Range: There SHALL NOT be a Range Parameter for this parameter.
• Default Range: DEVIATION (See .)

NAVFLAGS - Navigation Flags (see XFS_NAV_FLAG_*

• Parameter ID: %x00.00.3d
• Unit Usage: Radio/FMS ID
• SubUnit Usage: None
• Format: UINT (See .)
• Range: There SHALL NOT be a Range Parameter for this parameter.
• Values interpreted using nav_flag dictionary (See .)

, below, shows the values defined in the nav-flag Dictionary. These options represent the Navigational flag states. nav-flag Dictionary

Name	Value	Definition
BACKCOURSE	%x01	NAV receiver is flying a localizer back course
LOCDETECT	%x02	The NAV receiver is detecting a localizer
FROM	%x04	The FROM flag is detected from a VOR
TO	%x08	The TO flag is detected from a VOR
GSI-SFLAG	%x10	The glideslope superflag is present
GSI-VALID	%x20	The glideslope signal is being received and is valid
NAV-SFLAG	%x40	The NAV super flag is present
NAV-VALID	%x80	The localizer or VOR signal is being received and is valid
FAULT	%x01.00	Fault detected

FLAPREQ - Requested Flap Position 0 = up, 100000 = fully down, -100000 is fully negative

• Parameter ID: %x00.00.3e
• Unit Usage: Actuator/0=Aircraft
• SubUnit Usage: None
• Format: SINT (See .)
• Range: There SHALL NOT be a Range Parameter for this parameter.
• Default Range: SERVO (See .)

FLAPPOS - Flap actuator position, 0 = up, 100000 = fully down, -100000 is fully negative

• Parameter ID: %x00.00.3f
• Unit Usage: Actuator/0=Aircraft
• SubUnit Usage: None
• Format: SINT (See .)
• Range: There SHALL be a Range Parameter for this parameter.
• Default Range: SERVO (See .)

ECBSTAT - ECB Status change or request, see xfs_ecb.h

• Parameter ID: %x00.00.40
• Unit Usage: None
• SubUnit Usage: None
• Format: BUS (See .)
• Range: There SHALL NOT be a Range Parameter for this parameter.

PTRIMREQ - Requested Pitch Trim Position (negative nose down, 0 neutral, positive nose up)

• Parameter ID: %x00.00.41
• Unit Usage: None
• SubUnit Usage: None
• Format: SINT (See .)
• Range: There SHALL NOT be a Range Parameter for this parameter.
• Default Range: SERVO (See .)

PTRIMPOS - Pitch Trim Position (negative nose down, 0 neutral, positive nose up)

• Parameter ID: %x00.00.42
• Unit Usage: None
• SubUnit Usage: None
• Format: SINT (See .)
• Range: There SHALL be a Range Parameter for this parameter.
• Default Range: SERVO (See .)

RTRIMREQ - Requested Roll Trim Position (negative left bank, 0 neutral, positive right bank)

• Parameter ID: %x00.00.43
• Unit Usage: None
• SubUnit Usage: None
• Format: SINT (See .)
• Range: There SHALL NOT be a Range Parameter for this parameter.
• Default Range: SERVO (See .)

RTRIMPOS - Roll Trim Position (negative left bank, 0 neutral, positive right bank)

• Parameter ID: %x00.00.44
• Unit Usage: None
• SubUnit Usage: None
• Format: SINT (See .)
• Range: There SHALL be a Range Parameter for this parameter.
• Default Range: SERVO (See .)

BUSSTAT - Status of Bus

• Parameter ID: %x00.00.45
• Unit Usage: None
• SubUnit Usage: None
• Format: BUS (See .)
• Range: There SHALL NOT be a Range Parameter for this parameter.

TEMP - Arbitrary Temperature in a location

• Parameter ID: %x00.00.46
• Unit Usage: Location
• SubUnit Usage: Sensor Number/0=Average
• Format: SINT (See .)
• Range: There SHALL NOT be a Range Parameter for this parameter.
• Units: C multiplied by 100.

TAS - True Airspeed

• Parameter ID: %x00.00.47
• Unit Usage: Source ID
• SubUnit Usage: None
• Format: SINT (See .)
• Range: There SHALL NOT be a Range Parameter for this parameter.
• Units: KT multiplied by 100.

TAT - Total Air Temperature

• Parameter ID: %x00.00.48
• Unit Usage: Source ID
• SubUnit Usage: None
• Format: SINT (See .)
• Range: There SHALL NOT be a Range Parameter for this parameter.
• Units: C multiplied by 100.

OAT - Outside Air Temperature accounting for compressibility

• Parameter ID: %x00.00.49
• Unit Usage: Source ID
• SubUnit Usage: None
• Format: SINT (See .)
• Range: There SHALL be a Range Parameter for this parameter.
• Units: C multiplied by 100.

D-ALT - Density Altitude

• Parameter ID: %x00.00.4a
• Unit Usage: Source ID
• SubUnit Usage: None
• Format: SINT (See .)
• Range: There SHALL NOT be a Range Parameter for this parameter.
• Units: FT multiplied by 10.

OILPRES - Oil Pressure

• Parameter ID: %x00.00.4b
• Unit Usage: Engine
• SubUnit Usage: None
• Format: SINT (See .)
• Range: There SHALL be a Range Parameter for this parameter.
• Units: PSI multiplied by 100.

OILTEMP - Oil Temp

• Parameter ID: %x00.00.4c
• Unit Usage: Engine
• SubUnit Usage: None
• Format: SINT (See .)
• Range: There SHALL be a Range Parameter for this parameter.
• Units: C multiplied by 100.

XFDFPS - XFD Display Frames Per Second (FPS)

• Parameter ID: %x00.00.4d
• Unit Usage: Display
• SubUnit Usage: None
• Format: UINT (See .)
• Range: There SHALL NOT be a Range Parameter for this parameter.

TIREPRES - Tire Pressure

• Parameter ID: %x00.00.4e
• Unit Usage: Bogey
• SubUnit Usage: Tire
• Format: SINT (See .)
• Range: There SHALL be a Range Parameter for this parameter.
• Units: PSI multiplied by 100.

CHT - Cylinder Head Temperature

• Parameter ID: %x00.00.4f
• Unit Usage: Engine
• SubUnit Usage: Cylinder/0=Max
• Format: SINT (See .)
• Range: There SHALL be a Range Parameter for this parameter.
• Units: C multiplied by 100.

EGT - Exhaust Gas Temperature

• Parameter ID: %x00.00.50
• Unit Usage: Engine
• SubUnit Usage: Cylinder/0=Max
• Format: SINT (See .)
• Range: There SHALL be a Range Parameter for this parameter.
• Units: C multiplied by 100.

COOLTEMP - Coolant Temperature

• Parameter ID: %x00.00.51
• Unit Usage: Engine
• SubUnit Usage: None
• Format: SINT (See .)
• Range: There SHALL be a Range Parameter for this parameter.
• Units: C multiplied by 100.

FUELWTFLOW - Fuel Flow by Weight

• Parameter ID: %x00.00.52
• Unit Usage: Engine
• SubUnit Usage: None
• Format: SINT (See .)
• Range: There SHALL be a Range Parameter for this parameter.
• Units: LBPH multiplied by 100.

FUELPRES - Fuel Pressure

• Parameter ID: %x00.00.53
• Unit Usage: Engine
• SubUnit Usage: None
• Format: SINT (See .)
• Range: There SHALL be a Range Parameter for this parameter.
• Units: PSI multiplied by 100.

FUELWT - Fuel Weight

• Parameter ID: %x00.00.54
• Unit Usage: Fuel Tank ID/0=Sum of all
• SubUnit Usage: None
• Format: SINT (See .)
• Range: There SHALL be a Range Parameter for this parameter.
• Units: LB multiplied by 100.

MANPRES - Manifold pressure

• Parameter ID: %x00.00.55
• Unit Usage: Engine
• SubUnit Usage: None
• Format: SINT (See .)
• Range: There SHALL be a Range Parameter for this parameter.
• Units: INHG multiplied by 1000.

ENGRPM - Engine RPM

• Parameter ID: %x00.00.56
• Unit Usage: Engine
• SubUnit Usage: None
• Format: UINT (See .)
• Range: There SHALL be a Range Parameter for this parameter.

PROPRPM - Propeller RPM

• Parameter ID: %x00.00.57
• Unit Usage: Engine
• SubUnit Usage: None
• Format: UINT (See .)
• Range: There SHALL be a Range Parameter for this parameter.

MACH - Mach

• Parameter ID: %x00.00.58
• Unit Usage: Source ID
• SubUnit Usage: None
• Format: SINT (See .)
• Range: There SHALL NOT be a Range Parameter for this parameter.
• Units: MACH multiplied by 10000.

IASBUG - Target indicated airspeed

• Parameter ID: %x00.00.59
• Unit Usage: None
• SubUnit Usage: None
• Format: SINT (See .)
• Range: There SHALL NOT be a Range Parameter for this parameter.
• Units: KT multiplied by 100.

HDGBUG - Bugged Magnetic Heading

• Parameter ID: %x00.00.5a
• Unit Usage: None
• SubUnit Usage: None
• Format: UINT (See .)
• Range: There SHALL NOT be a Range Parameter for this parameter.
• Default Range: HDG (See .)
• Units: DEG multiplied by 100.

ALTBUG - Bugged Altitude

• Parameter ID: %x00.00.5b
• Unit Usage: None
• SubUnit Usage: None
• Format: SINT (See .)
• Range: There SHALL be a Range Parameter for this parameter.
• Units: FT multiplied by 10.

WAYPOINT - A way point in a flight plan, subunit is position in flightplan, beginning with 1 for first waypoint. Subunit 0 is only used to indicate an empty flight plan.

• Parameter ID: %x00.00.5c
• Unit Usage: FMS ID
• SubUnit Usage: None
• Format: WAYPOINT (See .)
• Range: There SHALL NOT be a Range Parameter for this parameter.

INSERT - Insert A way point in a flight plan, subunit is position in flightplan which it should become (SYSSEL/USERSEL ONLY)

• Parameter ID: %x00.00.5d
• Unit Usage: FMS ID
• SubUnit Usage: None
• Format: WAYPOINT (See .)
• Range: There SHALL NOT be a Range Parameter for this parameter.

DELETE - Delete A way point in a flight plan, subunit is position in flightplan starting at 1 (SYSSEL/USERSEL ONLY). Label must match

• Parameter ID: %x00.00.5e
• Unit Usage: FMS ID
• SubUnit Usage: None
• Format: WAYPOINT (See .)
• Range: There SHALL NOT be a Range Parameter for this parameter.

NOTE - Notation of something important within the quick access log or bus

• Parameter ID: %x00.00.5f
• Unit Usage: None
• SubUnit Usage: None
• Format: STRING (See .)
• Range: There SHALL NOT be a Range Parameter for this parameter.

NAVGPS - GPS Mode

• Parameter ID: %x00.00.60
• Unit Usage: NAV radio unit or FMS Unit Number
• SubUnit Usage: None
• Format: UINT (See .)
• Range: There SHALL NOT be a Range Parameter for this parameter.
• Values interpreted using nav_gps dictionary (See .)

, below, shows the values defined in the nav-gps Dictionary. These options represent the Global positioning system status. nav-gps Dictionary

Name	Value	Definition
UNKNOWN	%d0	GPS Navigation is in unknown state
ENROUTE	%d1	GPS Navigation is in Enroute state
TERMINAL	%d2	GPS Navigation is Terminal state
LNAV	%d3	GPS Navigation is in Lateral Navigation State
LNAVVNAV	%d4	GPS Navigation is Lateral and Vertical NAV state
LP	%d5	GPS Navigation is in Localizer Performance state
LPV	%d6	GPS Navigation is in Localizer Performance/Vertical state

COMFREQTX - Transmit Communication Frequency shares range with COMFREQ

• Parameter ID: %x00.00.61
• Unit Usage: Radio ID
• SubUnit Usage: 0=Radio/1+=Presets
• Format: UINT (See .)
• Range: There SHALL be a Range Parameter for this parameter.
• Default Range: COMFREQ (See .)
• Units: MHZ multiplied by 100000.

NAVXTK - Cross track error (negative is left)

• Parameter ID: %x00.00.62
• Unit Usage: FMS Unit Number
• SubUnit Usage: None
• Format: SINT (See .)
• Range: There SHALL NOT be a Range Parameter for this parameter.
• Units: NM multiplied by 1000.

COMFREQRX - Receive Communication Frequency shares range with COMFREQ

• Parameter ID: %x00.00.63
• Unit Usage: Radio ID
• SubUnit Usage: 0=Radio/1+=Presets
• Format: UINT (See .)
• Range: There SHALL be a Range Parameter for this parameter.
• Default Range: COMFREQ (See .)
• Units: MHZ multiplied by 100000.

BRIGHTNESS - Universal display brightness (0-1000 for night time mode, 1000-2000 for daytime modes

• Parameter ID: %x00.00.64
• Unit Usage: None
• SubUnit Usage: None
• Format: UINT (See .)
• Range: There SHALL NOT be a Range Parameter for this parameter.
• Default Range: BRIGHTNESS (See .)

MANTEMP - Manifold temperature

• Parameter ID: %x00.00.65
• Unit Usage: Engine
• SubUnit Usage: None
• Format: SINT (See .)
• Range: There SHALL NOT be a Range Parameter for this parameter.
• Units: C multiplied by 100.

DIRECT - Go direct to a way point in a flight plan, subunit is position in flightplan starting at 1 (SYSSEL/USERSEL ONLY). Label must match

• Parameter ID: %x00.00.66
• Unit Usage: None
• SubUnit Usage: None
• Format: WAYPOINT (See .)
• Range: There SHALL NOT be a Range Parameter for this parameter.

ACTIVATE - Activate leg terminating at way point in a flight plan, subunit is position in flightplan (SYSSEL/USERSEL ONLY). Label must match

• Parameter ID: %x00.00.67
• Unit Usage: None
• SubUnit Usage: None
• Format: WAYPOINT (See .)
• Range: There SHALL NOT be a Range Parameter for this parameter.

MMPARAM - Moving Map parameters. Subunit is one of XFS_MM_PARAM_*

• Parameter ID: %x00.00.68
• Unit Usage: MOVMAP ID
• SubUnit Usage: XFS_MM_PARAM_*
• Format: SINT (See .)
• Range: There SHALL NOT be a Range Parameter for this parameter.

SERVOREQ - Requested servo position and state

• Parameter ID: %x00.00.69
• Unit Usage: None
• SubUnit Usage: None
• Format: SERVO (See .)
• Range: There SHALL NOT be a Range Parameter for this parameter.

SERVOPOS - Current servo actuator position

• Parameter ID: %x00.00.6a
• Unit Usage: None
• SubUnit Usage: None
• Format: SINT (See .)
• Range: There SHALL NOT be a Range Parameter for this parameter.
• Default Range: SERVO (See .)

SONICHAT - Ultrasonic rangefinder height above terrain

• Parameter ID: %x00.00.6b
• Unit Usage: None
• SubUnit Usage: None
• Format: SINT (See .)
• Range: There SHALL NOT be a Range Parameter for this parameter.
• Units: FT multiplied by 100.

LIDARHAT - LIDAR rangefinder height above terrain

• Parameter ID: %x00.00.6c
• Unit Usage: Source ID
• SubUnit Usage: None
• Format: SINT (See .)
• Range: There SHALL NOT be a Range Parameter for this parameter.
• Units: FT multiplied by 100.

RADARHAT - Radar rangefinder height above terrain

• Parameter ID: %x00.00.6d
• Unit Usage: Source ID
• SubUnit Usage: None
• Format: SINT (See .)
• Range: There SHALL NOT be a Range Parameter for this parameter.
• Units: FT multiplied by 100.

HAT - Computed height above terrain

• Parameter ID: %x00.00.6e
• Unit Usage: Source ID
• SubUnit Usage: None
• Format: SINT (See .)
• Range: There SHALL be a Range Parameter for this parameter.
• Units: FT multiplied by 100.

COMSTANDBY - Standby COM Frequency (same rules and range as COMFREQ)

• Parameter ID: %x00.00.6f
• Unit Usage: Radio ID
• SubUnit Usage: None
• Format: UINT (See .)
• Range: There SHALL NOT be a Range Parameter for this parameter.
• Default Range: COMFREQ (See .)

NAVSTANDBY - Standby NAV Frequency (same rules and range as NAVFREQ)

• Parameter ID: %x00.00.70
• Unit Usage: Radio ID
• SubUnit Usage: None
• Format: UINT (See .)
• Range: There SHALL NOT be a Range Parameter for this parameter.
• Default Range: NAVFREQ (See .)

STALLSPEED - Estimated real-time Stall speed

• Parameter ID: %x00.00.71
• Unit Usage: None
• SubUnit Usage: None
• Format: SINT (See .)
• Range: There SHALL NOT be a Range Parameter for this parameter.
• Units: KT multiplied by 100.

YTRIMREQ - Requested Yaw Trim Position (negative left, 0 neutral, positive right)

• Parameter ID: %x00.00.73
• Unit Usage: None
• SubUnit Usage: None
• Format: SINT (See .)
• Range: There SHALL NOT be a Range Parameter for this parameter.
• Default Range: SERVO (See .)

YTRIMPOS - Yaw Trim Position (negative left, 0 neutral, positive right)

• Parameter ID: %x00.00.74
• Unit Usage: None
• SubUnit Usage: None
• Format: SINT (See .)
• Range: There SHALL be a Range Parameter for this parameter.
• Default Range: SERVO (See .)

VSPEEDBUG - Vertical speed bug in fpm

• Parameter ID: %x00.00.75
• Unit Usage: None
• SubUnit Usage: None
• Format: SINT (See .)
• Range: There SHALL NOT be a Range Parameter for this parameter.

MUSICSRC - Music Source (0 = none)

• Parameter ID: %x00.00.76
• Unit Usage: Audio Panel Unit
• SubUnit Usage: 0=System, 1=Pilot, 2=Copilot, rest are pax
• Format: UINT (See .)
• Range: There SHALL NOT be a Range Parameter for this parameter.

AOA - Angle of attack as an actual angle

• Parameter ID: %x00.00.77
• Unit Usage: Source
• SubUnit Usage: None
• Format: SINT (See .)
• Range: There SHALL NOT be a Range Parameter for this parameter.
• Units: DEG multiplied by 1000.

AOAR - Angle of attack range -- should contain green (beginning of approach range), white (reference angle), yellow (approaching stall) and a red (imminent stall)

• Parameter ID: %x00.00.77
• Unit Usage: None
• SubUnit Usage: None
• Format: RANGE (See .)
• Range: There SHALL NOT be a Range Parameter for this parameter.

GPIO - GPIO Input/Output

• Parameter ID: %x00.00.78
• Unit Usage: I/O Module
• SubUnit Usage: Module Port (0 or 1-8)
• Format: GPIO (See .)
• Range: There SHALL NOT be a Range Parameter for this parameter.

ANALOG - Raw Analog value 0-4095

• Parameter ID: %x00.00.79
• Unit Usage: I/O Module
• SubUnit Usage: Module Port (1-8)
• Format: UINT (See .)
• Range: There SHALL NOT be a Range Parameter for this parameter.

PWM - PWM value 0-4095 -- subunit is port number, 1-8

• Parameter ID: %x00.00.7a
• Unit Usage: I/O Module
• SubUnit Usage: Module Port (1-8)
• Format: UINT (See .)
• Range: There SHALL NOT be a Range Parameter for this parameter.

XPDRACID - ICAO 24-bit Aircraft Identifier

• Parameter ID: %x00.00.7b
• Unit Usage: XPDR ID (Rx Only) Zero for USERSELECT
• SubUnit Usage: None
• Format: UINT (See .)
• Range: There SHALL NOT be a Range Parameter for this parameter.
• Values interpreted using hex dictionary (See .)

, below, shows the values defined in the hex Dictionary. These options represent the Hexadecimal representation. hex Dictionary

Name	Value	Definition
hex	N/A	Hexadecimal representation

XPDRFLID - Up to 8-character, NULL terminated flight ID

• Parameter ID: %x00.00.7c
• Unit Usage: XPDR ID (Rx Only) Zero for USERSELECT
• SubUnit Usage: None
• Format: STRING (See .)
• Range: There SHALL NOT be a Range Parameter for this parameter.

THROTREQ - Requested throttle position

• Parameter ID: %x00.00.7d
• Unit Usage: None
• SubUnit Usage: None
• Format: SERVO (See .)
• Range: There SHALL NOT be a Range Parameter for this parameter.

RPMREQ - Prop governor requested RPM

• Parameter ID: %x00.00.7e
• Unit Usage: None
• SubUnit Usage: None
• Format: UINT (See .)
• Range: There SHALL NOT be a Range Parameter for this parameter.

TACHTIME - Tachometer time, unit is engine

• Parameter ID: %x00.00.7f
• Unit Usage: None
• SubUnit Usage: None
• Format: UINT (See .)
• Range: There SHALL NOT be a Range Parameter for this parameter.
• Units: S.

TOTTIME - Total aircraft time

• Parameter ID: %x00.00.80
• Unit Usage: None
• SubUnit Usage: None
• Format: UINT (See .)
• Range: There SHALL NOT be a Range Parameter for this parameter.
• Units: S.

APPSTAT - Application Status / Requests

• Parameter ID: %x00.00.00.81
• Unit Usage: CPU ID
• SubUnit Usage: Process ID
• Format: APP (See .)
• Range: There SHALL NOT be a Range Parameter for this parameter.

CDINAVSRC - Select index (> 0) of CDI NAV Source or 0 for none

• Parameter ID: %x00.00.82
• Unit Usage: Display
• SubUnit Usage: None
• Format: UINT (See .)
• Range: There SHALL NOT be a Range Parameter for this parameter.

BRGNAVSRC - Select index (> 0) CDI BRG Source or 0 for none

• Parameter ID: %x00.00.83
• Unit Usage: Display
• SubUnit Usage: None
• Format: UINT (See .)
• Range: There SHALL NOT be a Range Parameter for this parameter.

COMSEL - Select COM Radio for Tuning

• Parameter ID: %x00.00.84
• Unit Usage: Display
• SubUnit Usage: None
• Format: UINT (See .)
• Range: There SHALL NOT be a Range Parameter for this parameter.

NAVSEL - Select NAV Radio for Tuning

• Parameter ID: %x00.00.85
• Unit Usage: Display
• SubUnit Usage: None
• Format: UINT (See .)
• Range: There SHALL NOT be a Range Parameter for this parameter.

MSTRCAUTN - Master Caution Active when true. Resets by SYSSEL/USERSEL with value of FALSE

• Parameter ID: %x00.00.86
• Unit Usage: None
• SubUnit Usage: None
• Format: BOOL (See .)
• Range: There SHALL NOT be a Range Parameter for this parameter.

MSTRWARN - Master Warning Active when true. Resets by SYSSEL/USERSEL with value of FALSE

• Parameter ID: %x00.00.87
• Unit Usage: None
• SubUnit Usage: None
• Format: BOOL (See .)
• Range: There SHALL NOT be a Range Parameter for this parameter.

ROLLRT - Rate of change of about A/C longitudinal axis (P)

• Parameter ID: %x00.00.88
• Unit Usage: None
• SubUnit Usage: None
• Format: SINT (See .)
• Range: There SHALL NOT be a Range Parameter for this parameter.
• Units: DEGPS multiplied by 1000.

PITCHRT - Rate of change about A/C transverse axis (Q)

• Parameter ID: %x00.00.89
• Unit Usage: None
• SubUnit Usage: None
• Format: SINT (See .)
• Range: There SHALL NOT be a Range Parameter for this parameter.
• Units: DEGPS multiplied by 1000.

YAWRT - Rate of change about A/C vertical axis (R)

• Parameter ID: %x00.00.8a
• Unit Usage: None
• SubUnit Usage: None
• Format: SINT (See .)
• Range: There SHALL NOT be a Range Parameter for this parameter.
• Units: DEGPS multiplied by 1000.

STKPITCH - Stick Pitch Position (negative nose down, 0 neutral, positive nose up)

• Parameter ID: %x00.00.8b
• Unit Usage: None
• SubUnit Usage: None
• Format: SINT (See .)
• Range: There SHALL NOT be a Range Parameter for this parameter.
• Default Range: SERVO (See .)

STKROLL - Stick Roll Position (negative left bank, 0 neutral, positive right bank)

• Parameter ID: %x00.00.8c
• Unit Usage: None
• SubUnit Usage: None
• Format: SINT (See .)
• Range: There SHALL NOT be a Range Parameter for this parameter.
• Default Range: SERVO (See .)

STKYAW - Pedal Yaw Position (negative left, 0 neutral, positive right)

• Parameter ID: %x00.00.8d
• Unit Usage: None
• SubUnit Usage: None
• Format: SINT (See .)
• Range: There SHALL NOT be a Range Parameter for this parameter.
• Default Range: SERVO (See .)

BATTTEMP - Battery Temp

• Parameter ID: %x00.00.8e
• Unit Usage: None
• SubUnit Usage: None
• Format: SINT (See .)
• Range: There SHALL be a Range Parameter for this parameter.
• Units: C multiplied by 100.

MOTORTEMP - Motor Temp

• Parameter ID: %x00.00.8f
• Unit Usage: Motor
• SubUnit Usage: None
• Format: SINT (See .)
• Range: There SHALL be a Range Parameter for this parameter.
• Units: C multiplied by 100.

POWERTEMP - Temp of a device supplying/converting power to a propulsion system

• Parameter ID: %x00.00.90
• Unit Usage: Propulsion System
• SubUnit Usage: Power converter/0=Max
• Format: SINT (See .)
• Range: There SHALL be a Range Parameter for this parameter.
• Units: C multiplied by 100.

TORQUE - Torque

• Parameter ID: %x00.00.91
• Unit Usage: Motor/Engine
• SubUnit Usage: None
• Format: SINT (See .)
• Range: There SHALL be a Range Parameter for this parameter.
• Units: LBFT multiplied by 100.

TAILNUM - Up to 8-character, NULL terminated tail number

• Parameter ID: %x00.00.92
• Unit Usage: None
• SubUnit Usage: None
• Format: STRING (See .)
• Range: There SHALL NOT be a Range Parameter for this parameter.

ROLLREQ - F/D requested degrees of roll in 100 * degrees with 0 being right side up, -18000 being being upside down towards left, 18000 being upside down to the right

• Parameter ID: %x00.00.93
• Unit Usage: None
• SubUnit Usage: None
• Format: SINT (See .)
• Range: There SHALL NOT be a Range Parameter for this parameter.
• Default Range: ROLL (See .)

PITCHREQ - F/D requested degrees of pitch in 100 * degrees with 0 being straight ahead, 9000 being straight up, -9000 being straight down

• Parameter ID: %x00.00.94
• Unit Usage: None
• SubUnit Usage: None
• Format: SINT (See .)
• Range: There SHALL NOT be a Range Parameter for this parameter.
• Default Range: PITCH (See .)

YAWREQ - F/D requested G force of inclination with 0 being no yaw

• Parameter ID: %x00.00.95
• Unit Usage: None
• SubUnit Usage: None
• Format: SINT (See .)
• Range: There SHALL NOT be a Range Parameter for this parameter.
• Units: G multiplied by 10000.

STKPITCHREQ - A/P Requested Stick Pitch Position (negative nose down, 0 neutral, positive nose up)

• Parameter ID: %x00.00.96
• Unit Usage: None
• SubUnit Usage: None
• Format: SERVO (See .)
• Range: There SHALL NOT be a Range Parameter for this parameter.

STKROLLREQ - A/P Requested Stick Roll Position (negative left bank, 0 neutral, positive right bank)

• Parameter ID: %x00.00.97
• Unit Usage: None
• SubUnit Usage: None
• Format: SERVO (See .)
• Range: There SHALL NOT be a Range Parameter for this parameter.

STKYAWREQ - A/P Requested Pedal Yaw Position (negative left, 0 neutral, positive right)

• Parameter ID: %x00.00.98
• Unit Usage: None
• SubUnit Usage: None
• Format: SERVO (See .)
• Range: There SHALL NOT be a Range Parameter for this parameter.

FDMODEACT - Active Flight Director Modes

• Parameter ID: %x00.00.99
• Unit Usage: FD Number (0 for setting values)
• SubUnit Usage: None
• Format: UINT (See .)
• Range: There SHALL NOT be a Range Parameter for this parameter.
• Values interpreted using afcs_fd_mode dictionary (See .)

, below, shows the values defined in the afcs-fd-mode Dictionary. These options represent the Vertical, lateral and yaw modes of flight director. afcs-fd-mode Dictionary

Name	Value	Definition
VERT-MASK	%xff	Vertical modes mask
LAT-MASK	%xff.00	Lateral modes mask
YAW-MASK	%xff.00.00.00	Yaw modes mask
PITCH	%x01	Activate pitch mode
VS	%x02	Activate vertical speed mode
FLC	%x04	Activate indicated airspeed mode / flight level change
PRF	%x08	Activate angle of attack / performance mode
ALT	%x10	Arm Altitude mode
VNAV	%x20	Arm vertical nav mode
GP	%x40	Arm approach mode vertical portion
FLARE	%x80	Arm flare mode
ROLL	%x01.00	Activate wing leveler mode
HDG	%x02.00	Activate heading mode
NAV	%x04.00	Arm navigation mode
APPR	%x08.00	Arm approach mode
YD	%x01.00.00.00	Fixed Yaw Damper
SLIP	%x02.00.00.00	Activate slip mode (adjustable YD)
SLIPAPPR	%x04.00.00.00	Activate approach slip mode (adjustable YD)

FDMODEARM - Armed Flight Director Modes (XFS_AFCS_FD_MODE_*

• Parameter ID: %x00.00.9a
• Unit Usage: FD Number (0 for setting values)
• SubUnit Usage: None
• Format: UINT (See .)
• Range: There SHALL NOT be a Range Parameter for this parameter.
• Values interpreted using afcs_fd_mode dictionary (See .)

ALTHOLDBUG - Altitude used by FD for altitude hold

• Parameter ID: %x00.00.9b
• Unit Usage: None
• SubUnit Usage: None
• Format: SINT (See .)
• Range: There SHALL NOT be a Range Parameter for this parameter.
• Units: FT multiplied by 10.

APMODE - Autopilot Modes

• Parameter ID: %x00.00.9c
• Unit Usage: AP Number (0 for setting value)
• SubUnit Usage: None
• Format: UINT (See .)
• Range: There SHALL NOT be a Range Parameter for this parameter.
• Values interpreted using afcs_ap_mode dictionary (See .)

, below, shows the values defined in the afcs-ap-mode Dictionary. These options represent the Vertical, lateral and yaw modes of autopilot and throttle. afcs-ap-mode Dictionary

Name	Value	Definition
VERT-MASK	%xff	Vertical modes mask
LAT-MASK	%xff.00	Lateral modes mask
THROT-MASK	%xff.00.00	Throttle modes mask
YAW-MASK	%xff.00.00.00	Yaw modes mask
PITCH	%x01	Pitch mode
EPPITCH	%x02	Pitch mode only for envelope protection
ROLL	%x01.00	Roll mode
EPROLL	%x02.00	Roll mode only for envelope protection
SPD	%x01.00.00	Activate autothrottle speed tracking
EPSPD	%x02.00.00	Autothrottle only for envelope protection (SPD mode)
AOA	%x04.00.00	Activate autothrottle AoA tracking
EPAOA	%x08.00.00	Autothrottle only for envelope protection (AOA mode)
TOGA	%x10.00.00	Activate takeoff / go-around throttle
EPTOGA	%x20.00.00	Autothrottle only for envelope protection (TOGA mode)
YAW	%x01.00.00.00	Yaw mode
EPYAW	%x02.00.00.00	Yaw envelope protection

ICSSQL - Intercom Squelch (0-100)

• Parameter ID: %x00.00.9d
• Unit Usage: Audio Panel Unit
• SubUnit Usage: 0=System, 1=Pilot, 2=Copilot, rest are pax
• Format: UINT (See .)
• Range: There SHALL NOT be a Range Parameter for this parameter.
• Default Range: PERCENT (See .)
• Units: PCENT.

PITCHBUG - Target pitch

• Parameter ID: %x00.00.9e
• Unit Usage: None
• SubUnit Usage: None
• Format: SINT (See .)
• Range: There SHALL NOT be a Range Parameter for this parameter.
• Default Range: PITCH (See .)
• Units: DEG multiplied by 100.

PTSPEED - Power Turbine Speed (commonly N1)

• Parameter ID: %x00.00.9f
• Unit Usage: Engine
• SubUnit Usage: None
• Format: SINT (See .)
• Range: There SHALL be a Range Parameter for this parameter.
• Units: PCENT multiplied by 1000.

GTSPEED - Gas Turbine Speed (commonly N2 or Ng)

• Parameter ID: %x00.00.a0
• Unit Usage: Engine
• SubUnit Usage: None
• Format: SINT (See .)
• Range: There SHALL be a Range Parameter for this parameter.
• Units: PCENT multiplied by 1000.

TIT - Turbine Inlet Temperature

• Parameter ID: %x00.00.a1
• Unit Usage: Engine
• SubUnit Usage: Turbo/0=Max
• Format: SINT (See .)
• Range: There SHALL be a Range Parameter for this parameter.
• Units: C multiplied by 100.

ITT - Inter-Turbine Temperature

• Parameter ID: %x00.00.a2
• Unit Usage: Engine
• SubUnit Usage: Sensor/0=Average
• Format: SINT (See .)
• Range: There SHALL be a Range Parameter for this parameter.
• Units: C multiplied by 100.

POWER - Power under current engine and environmental conditions relative to engine design maximum

• Parameter ID: %x00.00.a3
• Unit Usage: Motor/Engine
• SubUnit Usage: None
• Format: SINT (See .)
• Range: There SHALL be a Range Parameter for this parameter.
• Default Range: SERVO (See .)
• Units: PCENT multiplied by 1000.

ENGSTATUS - Engine specific set of flags or values

• Parameter ID: %x00.00.a4
• Unit Usage: Motor/Engine
• SubUnit Usage: Engine Specific
• Format: UINT (See .)
• Range: There SHALL NOT be a Range Parameter for this parameter.
• Values interpreted using hex dictionary (See .)

CABINALT - Cabin Equivalent Altitude

• Parameter ID: %x00.00.a5
• Unit Usage: None
• SubUnit Usage: None
• Format: SINT (See .)
• Range: There SHALL be a Range Parameter for this parameter.
• Units: FT multiplied by 10.

CABINALTREQ - Cabin Equivalent Altitude

• Parameter ID: %x00.00.a6
• Unit Usage: None
• SubUnit Usage: None
• Format: SINT (See .)
• Range: There SHALL be a Range Parameter for this parameter.
• Units: FT multiplied by 10.

DIFFPRES - Differential Pressure

• Parameter ID: %x00.00.a7
• Unit Usage: None
• SubUnit Usage: None
• Format: SINT (See .)
• Range: There SHALL be a Range Parameter for this parameter.
• Units: PSI multiplied by 100.

DIFFPRESREQ - Requested Differential Pressure

• Parameter ID: %x00.00.a8
• Unit Usage: None
• SubUnit Usage: None
• Format: SINT (See .)
• Range: There SHALL be a Range Parameter for this parameter.
• Units: PSI multiplied by 100.

FUELTEMP - Arbitraty Temperature in a location

• Parameter ID: %x00.00.a9
• Unit Usage: Engine/Fuel Tank
• SubUnit Usage: SubLocation/0=Average,1=Sump
• Format: SINT (See .)
• Range: There SHALL be a Range Parameter for this parameter.
• Units: C multiplied by 100.

ENGSTATE - Engine operating state

• Parameter ID: %x00.00.aa
• Unit Usage: Motor/Engine
• SubUnit Usage: None
• Format: UINT (See .)
• Range: There SHALL NOT be a Range Parameter for this parameter.
• Values interpreted using engstate dictionary (See .)

, below, shows the values defined in the engstate Dictionary. These options represent the States of engines. engstate Dictionary

Name	Value	Definition
UNKNOWN	%x00	Engine Status Unknown
OFF	%x01	Engine is Off
DRYMOTOR	%x02	Engine Starting
STARTING	%x03	Engine Starting
RUNNING	%x04	Engine Running Normally
FLAMEOUT	%x05	Engine Flamed Out / Failure
SHUTDOWN	%x06	Engine Shutting Down
SHUTOFF	%x07	Engine Shut Off
MODE-MASK	%xff	Mask for Engine State
FLAG-IGNITION	%x01.00	Ignition On
FLAG-FUEL	%x02.00	Fuel Shutoff Open
FLAG-STARTER	%x04.00	Starter On
FLAG-GENERATOR	%x08.00	Generator On
FLAG-BLEED	%x10.00	Bleed Air On
FLAG-FIRE	%x01.00.00	Fire Present
FLAG-EXTINGUISH	%x02.00.00	Extinguisher Dispensed

ENGSTATEREQ - Requested Engine operating state

• Parameter ID: %x00.00.ab
• Unit Usage: Motor/Engine
• SubUnit Usage: None
• Format: UINT (See .)
• Range: There SHALL NOT be a Range Parameter for this parameter.
• Values interpreted using engstate dictionary (See .)

BLEEDAIR - Bleed Air Level (Percent of Max)

• Parameter ID: %x00.00.ac
• Unit Usage: Motor/Engine
• SubUnit Usage: None
• Format: UINT (See .)
• Range: There SHALL NOT be a Range Parameter for this parameter.
• Units: PCENT multiplied by 100.

BLEEDAIRREQ - Requested Bleed Air Level

• Parameter ID: %x00.00.ad
• Unit Usage: Motor/Engine
• SubUnit Usage: None
• Format: UINT (See .)
• Range: There SHALL NOT be a Range Parameter for this parameter.
• Units: PCENT multiplied by 100.

LIGHTING - Lighting Color/Level

• Parameter ID: %x00.00.ae
• Unit Usage: System
• SubUnit Usage: Specific
• Format: UINT (See .)
• Range: There SHALL NOT be a Range Parameter for this parameter.
• Units: RGBA.

LIGHTINGREQ - Requested Lighting Color/Level

• Parameter ID: %x00.00.af
• Unit Usage: System
• SubUnit Usage: Specific
• Format: UINT (See .)
• Range: There SHALL NOT be a Range Parameter for this parameter.
• Units: RGBA.

ICING - Deicing State

• Parameter ID: %x00.00.b0
• Unit Usage: System/0=Aircraft
• SubUnit Usage: Specific
• Format: UINT (See .)
• Range: There SHALL NOT be a Range Parameter for this parameter.
• Values interpreted using icing_flag dictionary (See .)

, below, shows the values defined in the icing-flag Dictionary. These options represent the Status of ice detection, anti-ice and deicing systems. icing-flag Dictionary

Name	Value	Definition
ENGINE	%x01	Engine Deicing/Anticing On
AIRFRAME	%x02	Airframe Deicing/Anticing On
INSEP	%x04	Inertial Separator Activated
PITOT	%x08	Pitot/Static Heat Activated
PROPHEAT	%x10	Propeller Heat Activated
WINDHEAT	%x20	Windshield Heat Activated
CARBHEAT	%x40	Carb Heat Activated
CARBICEDET	%x40.00	Carb Icing Detected
ICEDET	%x80.00	Icing Detected
ENGINE-FAIL	%x01.00.00	Engine Deicing/Anticing Failed
AIRFRAME-FAIL	%x02.00.00	Airframe Deicing/Anticing Failed
INSEP-FAIL	%x04.00.00	Inertial Separator Failed
PITOT-FAIL	%x08.00.00	Pitot/Static Heat Failed
PROPHEAT-FAIL	%x10.00.00	Propeller Heat Failed
WINDHEAT-FAIL	%x20.00.00	Windshield Heat Failed
CARBHEAT-FAIL	%x40.00.00	Carb Heat Failed
CARBICEDET-FAIL	%x40.00.00.00	Carb Icing Detection Failed
ICEDET-FAIL	%x80.00.00.00	Icing Detection Failed

ICINGREQ - Requested Deicing State

• Parameter ID: %x00.00.b1
• Unit Usage: System/0=Aircraft
• SubUnit Usage: Specific
• Format: UINT (See .)
• Range: There SHALL NOT be a Range Parameter for this parameter.
• Values interpreted using icing_flag dictionary (See .)

LDGGEAR - Landing Gear State

• Parameter ID: %x00.00.b2
• Unit Usage: Wheel/0=Aircraft
• SubUnit Usage: Specific
• Format: UINT (See .)
• Range: There SHALL NOT be a Range Parameter for this parameter.
• Values interpreted using ldggear dictionary (See .)

, below, shows the values defined in the ldggear Dictionary. These options represent the Status of retractable landing gear. ldggear Dictionary

Name	Value	Definition
UNKNOWN	%x00.00	Gear Status Unknown
DOWN	%x00.01	Landing Gear Down
UP	%x80.00	Landing Gear Up
FLAG-FAILED	%x01.00.00	Landing Gear System is Failed

LDGGEARREQ - Landing Gear State

• Parameter ID: %x00.00.b3
• Unit Usage: Wheel/0=Aircraft
• SubUnit Usage: Specific
• Format: UINT (See .)
• Range: There SHALL NOT be a Range Parameter for this parameter.
• Values interpreted using ldggear dictionary (See .)

CABINTEMP - Cabin Temperature in a zone

• Parameter ID: %x00.00.b4
• Unit Usage: Zone
• SubUnit Usage: Sensor Number/0=Average
• Format: SINT (See .)
• Range: There SHALL be a Range Parameter for this parameter.
• Units: C multiplied by 100.

CABINTEMPREQ - Requested Cabin Temperature in a zone

• Parameter ID: %x00.00.b5
• Unit Usage: Zone
• SubUnit Usage: Sensor Number/0=Average
• Format: SINT (See .)
• Range: There SHALL NOT be a Range Parameter for this parameter.
• Units: C multiplied by 100.

CHKLIST - Checklist Item

• Parameter ID: %x00.00.b6
• Unit Usage: Checklist Number
• SubUnit Usage: Item Number/0=Title
• Format: CASMSG (See .)
• Range: There SHALL NOT be a Range Parameter for this parameter.

WBARM - Arm for selected station or aircraft

• Parameter ID: %x00.00.b7
• Unit Usage: Configuration
• SubUnit Usage: 0=total/1=total no fuel/2+=station
• Format: SINT (See .)
• Range: There SHALL be a Range Parameter for this parameter.

WBCONFIG - Selected aircraft configuration for weight and balance

• Parameter ID: %x00.00.b8
• Unit Usage: None
• SubUnit Usage: None
• Format: UINT (See .)
• Range: There SHALL be a Range Parameter for this parameter.

WBCATEGORY - Weight and balance aircraft category

• Parameter ID: %x00.00.b9
• Unit Usage: Configuration
• SubUnit Usage: 0=total/1=total no fuel
• Format: UINT (See .)
• Range: There SHALL NOT be a Range Parameter for this parameter.
• Values interpreted using weightbal_category dictionary (See .)

, below, shows the values defined in the weightbal-category Dictionary. These options represent the Aircraft operational categories. weightbal-category Dictionary

Name	Value	Definition
NORMAL	%d1	Normal Category
UTILITY	%d2	Utility Category
ACROBATIC	%d3	Acrobatic Category
COMMUTER	%d4	Commuter Category

WBSTATUS - Flags about weight and balance

• Parameter ID: %x00.00.ba
• Unit Usage: Configuration
• SubUnit Usage: 0=total/1=total no fuel
• Format: UINT (See .)
• Range: There SHALL NOT be a Range Parameter for this parameter.
• Values interpreted using weightbal_status dictionary (See .)

, below, shows the values defined in the weightbal-status Dictionary. These options represent the Weight and balance status. weightbal-status Dictionary

Name	Value	Definition
OK	%d0	Weight and balance is OK
FWD	%x01	Balance is forward of minimum CG for this weight
AFT	%x02	Balance is aft of maximum CG for this weight
OVWTSTATN	%x04	One or more stations are overweight
OVERMGTOW	%x08	Weight exceeds maximum gross takeoff weight
OVERMLW	%x10	Weight exceeds max landing weight
OVERZFW	%x20	Weight exceeds max zero fuel weight

WBWEIGHT - Aircraft or station weight

• Parameter ID: %x00.00.bb
• Unit Usage: Configuration
• SubUnit Usage: 0=total/1=total no fuel/2+=station
• Format: SINT (See .)
• Range: There SHALL be a Range Parameter for this parameter.
• Units: LB multiplied by 10.

TASEFFWT - Fuel Economy Relative to True Airspeed and Weight

• Parameter ID: %x00.00.bc
• Unit Usage: None
• SubUnit Usage: None
• Format: SINT (See .)
• Range: There SHALL be a Range Parameter for this parameter.
• Units: NMPLB multiplied by 100000.

GSEFFWT - Fuel Economy Relative to Groundspeed and Weight

• Parameter ID: %x00.00.bd
• Unit Usage: None
• SubUnit Usage: None
• Format: SINT (See .)
• Range: There SHALL be a Range Parameter for this parameter.
• Units: NMPLB multiplied by 100000.

TIMETOEMPTY - Time to Empty

• Parameter ID: %x00.00.be
• Unit Usage: Engine/0=Aircraft
• SubUnit Usage: 0 - smoothed, without reserve, 1 - smoothed, with reserve, 2 - without reserve, 3 - with reserve
• Format: SINT (See .)
• Range: There SHALL be a Range Parameter for this parameter.
• Units: S multiplied by 10.

DISTTOEMPTY - Distance to Empty

• Parameter ID: %x00.00.bf
• Unit Usage: Engine/0=Aircraft
• SubUnit Usage: 0 - smoothed, without reserve, 1 - smoothed, with reserve, 2 - without reserve, 3 - with reserve
• Format: SINT (See .)
• Range: There SHALL be a Range Parameter for this parameter.
• Units: NM multiplied by 100.

FLIGHTSTATE - State of Flight

• Parameter ID: %x00.00.c0
• Unit Usage: None
• SubUnit Usage: None
• Format: UINT (See .)
• Range: There SHALL NOT be a Range Parameter for this parameter.
• Values interpreted using flight_state dictionary (See .)

, below, shows the values defined in the flight-state Dictionary. These options represent the Status of aircraft within flight profile. flight-state Dictionary

Name	Value	Definition
UNKNOWN	%d0	The state of the aircraft is not known
OFF	%d1	The aircraft is completely powered down
HIBERNATE	%d2	Minimal aircraft systems online not visible to the pilot
PREFLIGHT	%d3	Minimal aircraft systems for pilot interaction online
ENGINE-START	%d4	Engine(s) are preparing to start or are starting
PRETAXI	%d5	Engine(s) are started, awaiting pre-taxi items
TAXI	%d6	Aircraft is ready or in process of taxiing
RUNUP	%d7	Aircraft is ready for, or in process of performing runup
READY	%d8	Aircraft is ready for and positioned just short of takeoff
TAKEOFF	%d9	Aircraft is in process of performing takeoff
AFTER-TAKEOFF	%d10	Aircraft is airborne immediately but not yet configured for normal climb
DEPARTURE	%d11	Aircraft is on a standard instrument departure
CLIMB	%d12	Aircraft is climbing but not on an instrument departure
CRUISE	%d13	Aircraft is at final cruise
DESCENT	%d14	Aircraft is descending not on a standard arrival
ARRIVAL	%d15	Aircraft is on a standard arrival
APPROACH	%d16	Aircraft is on an instrument approach procedure
VISUAL	%d17	Aircraft is flying a visual traffic pattern
MISSED	%d18	Aircraft is executing a missed approach
SHUTDOWN	%d19	Aircraft engines are shutting down or have shut down
SECURE	%d20	Aircraft systems are shutting down or reconfiguring for preflight

UPDATESTATE - Status of any update

• Parameter ID: %x00.00.c1
• Unit Usage: None
• SubUnit Usage: None
• Format: UPDATE (See .)
• Range: There SHALL NOT be a Range Parameter for this parameter.

TORQUEREQ - Requested Torque

• Parameter ID: %x00.00.c2
• Unit Usage: Motor/Engine
• SubUnit Usage: None
• Format: SINT (See .)
• Range: There SHALL be a Range Parameter for this parameter.
• Units: LBFT multiplied by 100.

STKPITCHFRCE - Stick Pitch Force applied by the pilot, positive value - push, negative value - pull

• Parameter ID: %x00.00.c3
• Unit Usage: None
• SubUnit Usage: None
• Format: SINT (See .)
• Range: There SHALL NOT be a Range Parameter for this parameter.
• Units: LB multiplied by 100.

STKROLLFRCE - Stick Roll Force applied by the pilot, positive value - roll right, negative value - roll left

• Parameter ID: %x00.00.c4
• Unit Usage: None
• SubUnit Usage: None
• Format: SINT (See .)
• Range: There SHALL NOT be a Range Parameter for this parameter.
• Units: LB multiplied by 100.

STKYAWFRCE - Pedal Yaw Force applied by the pilot, positive value - right rudder, negative value - left rudder

• Parameter ID: %x00.00.c5
• Unit Usage: None
• SubUnit Usage: None
• Format: SINT (See .)
• Range: There SHALL NOT be a Range Parameter for this parameter.
• Units: LB multiplied by 100.

APPITCHFRCE - Auto Pilot Pitch Force exerted on control surfaces, positive value - push, negative value - pull

• Parameter ID: %x00.00.c6
• Unit Usage: None
• SubUnit Usage: None
• Format: SINT (See .)
• Range: There SHALL NOT be a Range Parameter for this parameter.
• Units: LB multiplied by 100.

APROLLFRCE - Auto Pilot Roll Force exerted on control surfaces, positive value - roll right, negative value - roll left

• Parameter ID: %x00.00.c7
• Unit Usage: None
• SubUnit Usage: None
• Format: SINT (See .)
• Range: There SHALL NOT be a Range Parameter for this parameter.
• Units: LB multiplied by 100.

APYAWFRCE - Auto Pilot Yaw Force exerted on control surfaces, positive value - right rudder, negative value - left rudder

• Parameter ID: %x00.00.c8
• Unit Usage: None
• SubUnit Usage: None
• Format: SINT (See .)
• Range: There SHALL NOT be a Range Parameter for this parameter.
• Units: LB multiplied by 100.

EFBPARAM - Up to 64-character, NULL terminated parameter value

• Parameter ID: %x00.00.c9
• Unit Usage: EFB ID
• SubUnit Usage: XFS_EFB_PARAM_*
• Format: STRING (See .)
• Range: There SHALL NOT be a Range Parameter for this parameter.

OILPRESCOMP - Compensated Oil Pressure

• Parameter ID: %x00.00.ca
• Unit Usage: Engine
• SubUnit Usage: None
• Format: SINT (See .)
• Range: There SHALL be a Range Parameter for this parameter.
• Units: PSI multiplied by 100.

MACHBUG - Target Mach

• Parameter ID: %x00.00.cb
• Unit Usage: None
• SubUnit Usage: None
• Format: SINT (See .)
• Range: There SHALL NOT be a Range Parameter for this parameter.
• Units: MACH multiplied by 10000.

AOART - Angle of attack rate of change

• Parameter ID: %x00.00.cc
• Unit Usage: Source
• SubUnit Usage: None
• Format: SINT (See .)
• Range: There SHALL NOT be a Range Parameter for this parameter.
• Units: DEG multiplied by 1000.

TASBUG - Target true airspeed

• Parameter ID: %x00.00.cd
• Unit Usage: None
• SubUnit Usage: None
• Format: SINT (See .)
• Range: There SHALL NOT be a Range Parameter for this parameter.
• Units: KT multiplied by 100.

GSBUG - Target groundspeed

• Parameter ID: %x00.00.ce
• Unit Usage: None
• SubUnit Usage: None
• Format: SINT (See .)
• Range: There SHALL NOT be a Range Parameter for this parameter.
• Units: KT multiplied by 100.

AOABUG - Bugged AOA

• Parameter ID: %x00.00.cf
• Unit Usage: None
• SubUnit Usage: None
• Format: SINT (See .)
• Range: There SHALL NOT be a Range Parameter for this parameter.
• Units: DEG multiplied by 1000.

ECUTIME - ECU Hours

• Parameter ID: %x00.00.d1
• Unit Usage: Engine
• SubUnit Usage: None
• Format: UINT (See .)
• Range: There SHALL be a Range Parameter for this parameter.
• Units: HR multiplied by 1000.

DBASE - Active database information

• Parameter ID: %x00.00.d2
• Unit Usage: CPU ID
• SubUnit Usage: Process ID
• Format: DBASE (See .)
• Range: There SHALL NOT be a Range Parameter for this parameter.

EAS - Equivalent Airspeed

• Parameter ID: %x00.00.d3
• Unit Usage: Source ID
• SubUnit Usage: None
• Format: SINT (See .)
• Range: There SHALL be a Range Parameter for this parameter.
• Units: KT multiplied by 100.

EASRT - Equivalent Airspeed Rate of Change

• Parameter ID: %x00.00.d4
• Unit Usage: Source ID
• SubUnit Usage: None
• Format: SINT (See .)
• Range: There SHALL NOT be a Range Parameter for this parameter.
• Units: KTPS multiplied by 100.

EASBUG - Target equivalent airspeed

• Parameter ID: %x00.00.d5
• Unit Usage: None
• SubUnit Usage: None
• Format: SINT (See .)
• Range: There SHALL NOT be a Range Parameter for this parameter.
• Units: KT multiplied by 100.

POWERREQ - Requested power as percent of engine design maximum

• Parameter ID: %x00.00.d6
• Unit Usage: Motor/Engine
• SubUnit Usage: None
• Format: SINT (See .)
• Range: There SHALL NOT be a Range Parameter for this parameter.
• Units: PCENT multiplied by 1000.

BRAKE - Wheel brake status

• Parameter ID: %x00.00.d7
• Unit Usage: Left=1,Right=2,No direction=0
• SubUnit Usage: Specific
• Format: UINT (See .)
• Range: There SHALL NOT be a Range Parameter for this parameter.
• Values interpreted using brake dictionary (See .)

, below, shows the values defined in the brake Dictionary. These options represent the Status of wheel brakes. brake Dictionary

Name	Value	Definition
UNKNOWN	%x00.00	Brake Status Unknown
NONE	%x00.01	Brakes not pressed
MAX	%x80.00	Max Braking
PARK	%x01.00.00	Parking Brake Engaged
FLAG-FAILED	%x02.00.00	Brake System is Failed

BRAKEREQ - Amount of brake requested

• Parameter ID: %x00.00.d8
• Unit Usage: Left=1,Right=2,No direction=0
• SubUnit Usage: Specific
• Format: UINT (See .)
• Range: There SHALL NOT be a Range Parameter for this parameter.
• Values interpreted using brake dictionary (See .)

NAVSQL - Communication Squelch (0-100)

• Parameter ID: %x00.00.d9
• Unit Usage: Radio ID
• SubUnit Usage: None
• Format: UINT (See .)
• Range: There SHALL NOT be a Range Parameter for this parameter.
• Default Range: PERCENT (See .)
• Units: PCENT.

STATIONID - VOR Station ID decoded from Morse code

• Parameter ID: %x00.00.da
• Unit Usage: Radio ID
• SubUnit Usage: None
• Format: STRING (See .)
• Range: There SHALL NOT be a Range Parameter for this parameter.

SVPARAM - Synthetic Vision parameters. Subunit is one of XFS_SV_PARAM_*

• Parameter ID: %x00.00.db
• Unit Usage: SYNVIS ID
• SubUnit Usage: XFS_SV_PARAM_*
• Format: SINT (See .)
• Range: There SHALL NOT be a Range Parameter for this parameter.

FDCDISEL - Global selection of which CDI the flight director should track

• Parameter ID: %x00.00.dc
• Unit Usage: None
• SubUnit Usage: None
• Format: UINT (See .)
• Range: There SHALL NOT be a Range Parameter for this parameter.

BLOODOXY - Blood oxygen level of given seat occupant

• Parameter ID: %x00.00.dd
• Unit Usage: Seat position, 0=Lowest of all seats, 1=Pilot, 2=Copilot, etc
• SubUnit Usage: None
• Format: UINT (See .)
• Range: There SHALL be a Range Parameter for this parameter.
• Default Range: THOUPERCENT (See .)
• Units: PCENT multiplied by 1000.

PULSE - Pulse rate of given seat occupant

• Parameter ID: %x00.00.de
• Unit Usage: Seat position, 0=Worst of all seats (too low or high), 1=Pilot, 2=Copilot, etc
• SubUnit Usage: None
• Format: UINT (See .)
• Range: There SHALL be a Range Parameter for this parameter.
• Units: CPM multiplied by 1000.

BREATHS - Breathing rate of given seat occupant

• Parameter ID: %x00.00.df
• Unit Usage: Seat position, 0=Worst of all seats (too low or high), 1=Pilot, 2=Copilot, etc
• SubUnit Usage: None
• Format: UINT (See .)
• Range: There SHALL be a Range Parameter for this parameter.
• Units: CPM multiplied by 1000.

CARBMONOX - Carbon Monoxide levels detected by sensor

• Parameter ID: %x00.00.e0
• Unit Usage: Carbon Monoxide Sensor ID
• SubUnit Usage: None
• Format: UINT (See .)
• Range: There SHALL be a Range Parameter for this parameter.
• Units: PPM multiplied by 100.

FLOWRATE - Oxygen flow rate

• Parameter ID: %x00.00.e1
• Unit Usage: Seat position, 0=Worst of all seats (too low or high), 1=Pilot, 2=Copilot, etc
• SubUnit Usage: None
• Format: UINT (See .)
• Range: There SHALL be a Range Parameter for this parameter.
• Units: LPM multiplied by 100.

TANKPRES - Oxygen tank pressure

• Parameter ID: %x00.00.e2
• Unit Usage: Tank number, 0=Worst of all tanks (too low or high), 1=Tank 1, 2=Tank 2, etc
• SubUnit Usage: None
• Format: UINT (See .)
• Range: There SHALL be a Range Parameter for this parameter.
• Units: PSI multiplied by 100.

RNAVVS - Vertical speed computed from RNAV

• Parameter ID: %x00.00.e3
• Unit Usage: Source ID
• SubUnit Usage: None
• Format: SINT (See .)
• Range: There SHALL NOT be a Range Parameter for this parameter.
• Units: FPM multiplied by 1.

COMPRESET - Selected COM Radio Preset (0=Non-preset frequency)

• Parameter ID: %x00.00.e4
• Unit Usage: Radio
• SubUnit Usage: None
• Format: UINT (See .)
• Range: There SHALL be a Range Parameter for this parameter.
• Values interpreted using preset dictionary (See .)

, below, shows the values defined in the preset Dictionary. These options represent the XFS Preset Frequency. preset Dictionary

Name	Value	Definition
MANUAL	%d0	Manual Tuning (no preset)
LAST	%xff.fe	Last selected frequency

COMNAME - Name of COM Radio or Preset Frequency

• Parameter ID: %x00.00.e5
• Unit Usage: Radio
• SubUnit Usage: 0=Radio/1+=Presets
• Format: STRING (See .)
• Range: There SHALL NOT be a Range Parameter for this parameter.

NAVPRESET - Selected NAV Radio Preset (0=Non-preset frequency)

• Parameter ID: %x00.00.e6
• Unit Usage: Radio
• SubUnit Usage: None
• Format: UINT (See .)
• Range: There SHALL be a Range Parameter for this parameter.
• Values interpreted using preset dictionary (See .)

NAVNAME - Name of NAV Radio or Preset Frequency

• Parameter ID: %x00.00.e7
• Unit Usage: Radio
• SubUnit Usage: 0=Radio/1+=Presets
• Format: STRING (See .)
• Range: There SHALL NOT be a Range Parameter for this parameter.

VNORTH - North component of velocity in true world coordinates

• Parameter ID: %x00.00.e8
• Unit Usage: Source ID
• SubUnit Usage: None
• Format: SINT (See .)
• Range: There SHALL be a Range Parameter for this parameter.
• Units: KT multiplied by 100.

VEAST - East component of velocity in true world coordinates

• Parameter ID: %x00.00.e9
• Unit Usage: Source ID
• SubUnit Usage: None
• Format: SINT (See .)
• Range: There SHALL be a Range Parameter for this parameter.
• Units: KT multiplied by 100.

ENGPOWER - Current Engine Power

• Parameter ID: %x00.00.ea
• Unit Usage: Engine
• SubUnit Usage: 0=Shaft Power/1=Input Power Consumption/2+(even)=Component Shaft Power, 3+(odd)=Component Power Consumption
• Format: UINT (See .)
• Range: There SHALL be a Range Parameter for this parameter.
• Units: KW multiplied by 1000.

CHARGE - Measured remaining battery charge

• Parameter ID: %x00.00.eb
• Unit Usage: Battery ID/0=Sum of all
• SubUnit Usage: None
• Format: SINT (See .)
• Range: There SHALL be a Range Parameter for this parameter.
• Units: AH multiplied by 1000.

CHARGETOT - Computed remaining charge

• Parameter ID: %x00.00.ec
• Unit Usage: Power System ID/0=Sum of all
• SubUnit Usage: 0 = current total, 1 = total at end of flight
• Format: SINT (See .)
• Range: There SHALL NOT be a Range Parameter for this parameter.
• Units: AH multiplied by 1000.

RWYSEL - Select airport runway surface to waypoint that is an airport, subunit is position in flightplan (SYSSEL/USERSEL ONLY). Label must match

• Parameter ID: %x00.00.ed
• Unit Usage: None
• SubUnit Usage: None
• Format: WAYPOINT (See .)
• Range: There SHALL NOT be a Range Parameter for this parameter.

COMSECMODE - Communication Security Mode

• Parameter ID: %x00.00.ee
• Unit Usage: Radio
• SubUnit Usage: 0=Radio/1+=Presets
• Format: UINT (See .)
• Range: There SHALL NOT be a Range Parameter for this parameter.
• Values interpreted using com_secmode dictionary (See .)

, below, shows the values defined in the com-secmode Dictionary. These options represent the Communication Security Mode. com-secmode Dictionary

Name	Value	Definition
TD	%d1	TD
PT	%d2	Plain Text
CT	%d7	Cypher Text
INVALID	%d8	Invalid Reserved
RV	%d14	RV

COMBAND - Communication Band

• Parameter ID: %x00.00.ef
• Unit Usage: None
• SubUnit Usage: None
• Format: UINT (See .)
• Range: There SHALL NOT be a Range Parameter for this parameter.
• Values interpreted using com_band dictionary (See .)

, below, shows the values defined in the com-band Dictionary. These options represent the Communication Band. com-band Dictionary

Name	Value	Definition
UNKNOWN	%d0	Unknown communication band
VHFFM	%d1	Very High Frequency with Frequency Modulation
VHFAM	%d2	Very High Frequency Amplitude Modulation
UHFFM	%d3	Ultra High Frequency
UHFAM	%d4	Ultra High Frequency
P25A	%d5	Project 25 Analog
P25D	%d6	Project 25 Digital
P25T	%d7	Project 25 Trunk Mode
TSM	%d8	Trellisware Scalable Mobile Ad-hoc NETworking
SATCOM	%d9	Satellite Communication
SNGRS	%d10	SINCGARS Frequency Hop Frequencies
HFAM	%d11	High Frequency Ampltitude Modulation
WREN	%d12	Warrior Robust Enhanced Network Narrowband

COMBANDMASK - Supported Communication Bands

• Parameter ID: %x00.00.f0
• Unit Usage: Radio
• SubUnit Usage: None
• Format: UINT (See .)
• Range: There SHALL NOT be a Range Parameter for this parameter.
• Values interpreted using com_bandmask dictionary (See .)

, below, shows the values defined in the com-bandmask Dictionary. These options represent the Supported Communication Band Mask. com-bandmask Dictionary

Name	Value	Definition
VHFFM	%x01	Very High Frequency with Frequency Modulation
VHFAM	%x02	Very High Frequency with Amplitude Modulation
UHFFM	%x04	Ultra High Frequency with Frequency Modulation
UHFAM	%x08	Ultra High Frequency with Amplitude Modulation
P25A	%x10	Project 25 Analog
P25D	%x20	Project 25 Digital
P25T	%x40	Project 25 Trunk Mode
TSM	%x80	Trellisware Scalable Mobile Ad-hoc NETworking
SATCOM	%x01.00	Satellite Communication
SINCGARS	%x02.00	SINCGARS Frequency Hop Frequencies
HFAM	%x04.00	High Frequency

COMSQLMODETX - Squelch mode for transmit

• Parameter ID: %x00.00.f1
• Unit Usage: Radio
• SubUnit Usage: 0=Radio/1+=Presets
• Format: UINT (See .)
• Range: There SHALL NOT be a Range Parameter for this parameter.
• Values interpreted using com_sqlmode dictionary (See .)

, below, shows the values defined in the com-sqlmode Dictionary. These options represent the Communication Squelch Mode. com-sqlmode Dictionary

Name	Value	Definition
UNKNOWN	%d0	Unknown Squelch Mode
NONE	%d1	Squelch Off
SNR	%d2	Signal to Noise Ratio
TONE	%d3	FM Military Tone Squelch System
CTCSS	%d4	Continuous Tone Coded Squelch System
DCS	%d5	Digital Code Squelch
NAC	%d6	Network Access Code P25 Trunk Mode

COMSQLMODERX - Squelch mode for receive

• Parameter ID: %x00.00.f2
• Unit Usage: Radio
• SubUnit Usage: 0=Radio/1+=Presets
• Format: UINT (See .)
• Range: There SHALL NOT be a Range Parameter for this parameter.
• Values interpreted using com_sqlmode dictionary (See .)

COMCTCSSTX - Frequency for CTCSS in Analog Transmit

• Parameter ID: %x00.00.f3
• Unit Usage: Radio
• SubUnit Usage: 0=Radio/1+=Presets
• Format: UINT (See .)
• Range: There SHALL NOT be a Range Parameter for this parameter.

COMCTCSSRX - Frequency for CTCSS in Analog Receive

• Parameter ID: %x00.00.f4
• Unit Usage: Radio
• SubUnit Usage: 0=Radio/1+=Presets
• Format: UINT (See .)
• Range: There SHALL NOT be a Range Parameter for this parameter.

COMDCSTX - Digital-Coded Squelch in Digital Transmit

• Parameter ID: %x00.00.f5
• Unit Usage: Radio
• SubUnit Usage: 0=Radio/1+=Presets
• Format: UINT (See .)
• Range: There SHALL NOT be a Range Parameter for this parameter.

COMDCSRX - Digital-Coded Squelch in Digital Receive

• Parameter ID: %x00.00.f6
• Unit Usage: Radio
• SubUnit Usage: 0=Radio/1+=Presets
• Format: UINT (See .)
• Range: There SHALL NOT be a Range Parameter for this parameter.

COMNACTX - Network Access Code in P25 Digital Transmit

• Parameter ID: %x00.00.f7
• Unit Usage: Radio
• SubUnit Usage: 0=Radio/1+=Presets
• Format: UINT (See .)
• Range: There SHALL NOT be a Range Parameter for this parameter.

COMNACRX - Network Access Code in P25 Digital Receive

• Parameter ID: %x00.00.f8
• Unit Usage: Radio
• SubUnit Usage: 0=Radio/1+=Presets
• Format: UINT (See .)
• Range: There SHALL NOT be a Range Parameter for this parameter.

COMSPACING - Communication Frequency Spacing

• Parameter ID: %x00.00.f9
• Unit Usage: Radio
• SubUnit Usage: 0=Radio/1+=Presets
• Format: UINT (See .)
• Range: There SHALL NOT be a Range Parameter for this parameter.
• Units: MHZ multiplied by 100000.

COMTGROUP - Active Communication Talk Group

• Parameter ID: %x00.00.fa
• Unit Usage: Radio
• SubUnit Usage: 0=Radio/1+=Presets
• Format: UINT (See .)
• Range: There SHALL NOT be a Range Parameter for this parameter.

COMTGROUPR - Range for Talk Groups

• Parameter ID: %x00.00.fb
• Unit Usage: Radio
• SubUnit Usage: None
• Format: RANGE (See .)
• Range: There SHALL NOT be a Range Parameter for this parameter.

COMTGNAME - Name of Talk Group

• Parameter ID: %x00.00.fc
• Unit Usage: Radio
• SubUnit Usage: 0=radio active talk group, 1+= talkgroup name
• Format: STRING (See .)
• Range: There SHALL NOT be a Range Parameter for this parameter.

COMGUARD - If true monitor guard frequency

• Parameter ID: %x00.00.fd
• Unit Usage: Radio
• SubUnit Usage: 0=Radio/1+=Presets
• Format: BOOL (See .)
• Range: There SHALL NOT be a Range Parameter for this parameter.

COMENCRYPT - If true, radio is operating in encrypted mode

• Parameter ID: %x00.00.fe
• Unit Usage: Radio
• SubUnit Usage: 0=Radio/1+=Presets
• Format: BOOL (See .)
• Range: There SHALL NOT be a Range Parameter for this parameter.

FUELVOLTOT - Computed remaining fuel volume

• Parameter ID: %x00.00.ff
• Unit Usage: Fuel System ID/0=Sum of all
• SubUnit Usage: 0 = current total, 1 = total at end of flight
• Format: SINT (See .)
• Range: There SHALL NOT be a Range Parameter for this parameter.
• Units: GAL multiplied by 1000.

FUELVOLFLOW - Fuel Flow by Volume

• Parameter ID: %x00.01.00
• Unit Usage: Engine
• SubUnit Usage: None
• Format: SINT (See .)
• Range: There SHALL be a Range Parameter for this parameter.
• Units: GPH multiplied by 1000.

FUELVOL - Fuel Volume

• Parameter ID: %x00.01.01
• Unit Usage: Fuel Tank ID/0=Sum of all
• SubUnit Usage: None
• Format: SINT (See .)
• Range: There SHALL be a Range Parameter for this parameter.
• Units: GAL multiplied by 1000.

TASEFFVOL - Fuel Economy Relative to True Airspeed and Volume

• Parameter ID: %x00.01.02
• Unit Usage: None
• SubUnit Usage: None
• Format: SINT (See .)
• Range: There SHALL be a Range Parameter for this parameter.
• Units: NMPGAL multiplied by 1000000.

GSEFFVOL - Fuel Economy Relative to Groundspeed and Volume

• Parameter ID: %x00.01.03
• Unit Usage: None
• SubUnit Usage: None
• Format: SINT (See .)
• Range: There SHALL be a Range Parameter for this parameter.
• Units: NMPGAL multiplied by 1000000.

BITEST - Built-In Test Status

• Parameter ID: %x00.01.04
• Unit Usage: Device identifier/0=Whole Aircraft
• SubUnit Usage: Test Number/0=Roll up of all tests for device
• Format: CASMSG (See .)
• Range: There SHALL NOT be a Range Parameter for this parameter.

Message Transport

Message Composition Application software on a node determines when information or raw data need to be sent onto the network. These transmissions are done as messages with raw data and messages with parameters. If subsequent information or raw data having the same message class, ID, and flags occur in a timely fashion, they MAY be coalesced into a single message. For each parameter to be sent, the common header (See ) for the message data items MUST be populated. In addition, the Ident and Parameter Data MUST be populated with the corresponding data as per . The length in the common header MUST represent the actual length of the data, however, each parameter must be padded to a size that is a multiple of four octets. The message header MUST be populated with the corresponding data as per , the message number MUST be monotonically increasing with an arbitrary initial value, and then the length in the common header MUST be set equal to the sum of the padded parameter length values. Once this assembly process is complete, the message can be transmitted.

Message Transmission and Reliability XSEDE is designed to be used with a multicast UDP protocol however, there is no requirement to do so. Each endpoint MUST specify a listening address and port number with the default being 224.0.0.69 on port 20234 for IPv4. The actual address and port number are to be chosen by the system designer / installer for their particular needs. specifies IPv4 Multicast Address Assignments and SHOULD be followed. If the XSEDE message is successfully transmitted, no further action is required. Data assurance is the responsibility of the nodes implementing the XSEDE protocol.

Message Reception & decoding XSEDE messages are received on the address and port that was configured in the prior section. The structure of the XSEDE message is designed to for flexible deployment in different networks. A node MAY use the src id to filter messages. This can either be a node filtering its own sent messages or filtering out messages from irrelevant nodes (i.e. selecting only specific computers when playing back a QAR file). The message number allows a node to ensure that messages are not processed out of sequence or duplicated. A node SHOULD ignore any message that is received out of sequence. A node MAY use the parameter identifiers to determine what information if any is relevant for local processing. Local processing is beyond the scope of this document. Since there is no assured message delivery, all parameter interpretations MUST be idempotent to ensure multiple interpretations, or execution results in the same outcome.

Message Signing Since XSEDE operates on a closed network, message signing is not currently supported but may be added in the future.

Example Message Flows This section illustrates XSEDE features by example. The first example controls the radio.

Adjust radio This example sets the radio Set Radio frequency and squelch by broadcasting USERSEL parameters. If a node controlling the radio receives the request, it will respond with a result similar to the one shown afterwards.

Message Header

Message Header Format 1 2 3 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | src id | message number | | 1001 | 20 | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | msg class | message ID | flags | | 3 = OP | FLIGHTDATA 2 | LEVEL-A 5 | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | tcid | len | | NONE 0 | %x10 | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ ...

src id:

UINT16; This value was set to 1001 decimal at installation time.

message number:

UINT16; 20 decimal for illustration purposes.

msg class:

UINT8; "OP" value 3 decimal.

message ID:

UINT8; FLIGHTDATA decimal 2

flags:

UINT16; LEVEL-A decimal 5; See .

tcid:

t-NONE; See .

len:

UINT16 ; 0x10, or decimal 16 octets.

Frequency Message Header

Setting frequency to 122.750 1 2 3 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Unit | SubUnit | | 2 | 0 | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Parameter Data Len | Ident | | 4 | COMFREQKHZ %x00.00.24 | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Format | Confidence | Expire | Pflags | | UINT 2 | USERSEL 192 | %x00 | LEVEL-A 5 | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ : Parameter Data : | 122750 or 0x0001 df7e | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+

Unit:

UINT16; decimal 2 to match the requested radio.

SubUnit:

UINT16; 0 to signify the radio itself.

Parameter Data Len:

11 bits; decimal 4.

Ident:

21 bits; COMFREQKHZ - Communication Frequency, value %x00.00.24 See .

Format:

UINT (OCTET): decimal 2. See .

Confidence:

decimal 192 (OCTET): USERSEL. See .

Expire:

OCTET; Time to live. %x00 to not expire. See for encoding.

Pflags:

LEVEL-A (OCTET) decimal 5. See

Parameter Data:

*(OCTET) value would be 122750, 0x0001 df7e.

Squelch Message Header

Setting Squelch to 53 1 2 3 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Unit | SubUnit | | 2 | 0 | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Parameter Data Len | Ident | | 4 | COMSQL %x00.00.28 | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Format | Confidence | Expire | Pflags | | UINT 2 | USERSEL 192 | %x00 | LEVEL-A 5 | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ : Parameter Data : | 53 or 0x0000 0035 | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+

Unit:

UINT16; decimal 2 to match the requested radio.

SubUnit:

UINT16; 0 to signify the radio itself.

Parameter Data Len:

11 bits; decimal 4.

Ident:

21 bits; COMSQL - Communication Squelch (0-100), value %x00.00.28 See .

Format:

UINT (OCTET): decimal 2. See .

Confidence:

decimal 192 (OCTET): USERSEL. See .

Expire:

OCTET; Time to live. %x00 to not expire. See for encoding.

Pflags:

LEVEL-A (OCTET) decimal 5. See

Parameter Data:

*(OCTET) value would be 53, 0x0000 0035.

Radio Status Report After the above parameters affect a change in the radio, or as part of the radio's regularly scheduled parameter broadcast, a message like the following will be transmitted. It has almost all the same values as the original message but would likely include other parameters as well. Only the changed parameters are described. The expire time is chosen at 2-3 times the scheduled broadcast time to ensure a fresh message is received within the valid time period should one be lost.

Radio Response Message 1 2 3 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | src id | message number | | 1777 | 1255 | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | msg class | message ID | flags | | 3 = OP | FLIGHTDATA 2 | LEVEL-A 5 | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | tcid | len | | NONE 0 | %x20 | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Unit | SubUnit | | 2 | 0 | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Parameter Data Len | Ident | | 4 | COMFREQKHZ %x00.00.24 | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Format | Confidence | Expire | Pflags | | UINT 2 | RAW / R 10 | %xC9 | LEVEL-A 5 | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ : Parameter Data : | 122750 or 0x0001 df7e | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Unit | SubUnit | | 2 | 0 | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Parameter Data Len | Ident | | 4 | COMSQL %x00.00.28 | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Format | Confidence | Expire | Pflags | | UINT 2 | RAW / R 10 | %xC9 | LEVEL-A 5 | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ : Parameter Data : | 53 or 0x0000 0035 | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+

src id:

UINT16; This value is different than the prior message because this message is sent by the node controlling the radio. It was set to 1777 decimal at installation time.

message number:

UINT16; decimal 1255 for illustrative purposes. Note: this value is the current message sequence number for node 1777.

Confidence:

decimal 10 (OCTET): RAW / REPORTED in both parameters since this value is the actual reported value from the device. See .

Expire:

OCTET; Time to live. %xC9 to expire in about 15 seconds. See for encoding.

Deploy Landing Gear Example Landing Gear changes are different than radio changes in that it may take several seconds to affect a change. In this scenario, we will see a report by the node controlling the landing gear, followed by a parameter showing the user selecting a new value. Next, there will be a series of parameter broadcasts that showing the gear moving into position.

Initial Gear State Message

Initial gear state message 1 2 3 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | src id | message number | | 2222 | 3400 | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | msg class | message ID | flags | | 3 = OP | FLIGHTDATA 2 | LEVEL-A 5 | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | tcid | len | | NONE 0 | %x20 | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Unit | SubUnit | | 1 | 0 | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Parameter Data Len | Ident | | 4 | LDGGEAR %x00.00.b2 | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Format | Confidence | Expire | Pflags | | UINT 2 | RAW / R 10 | %x77 | LEVEL-A 5 | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ : Parameter Data : | 0x8000 - up. | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Unit | SubUnit | | 2 | 0 | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Parameter Data Len | Ident | | 4 | LDGGEAR %x00.00.b2 | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Format | Confidence | Expire | Pflags | | UINT 2 | RAW / R 10 | %x77 | LEVEL-A 5 | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ : Parameter Data : | 0x8000 - up. | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+

Above we see a periodic message indicating that each of the two landing gear are in an up position. If these were the only two landing gear, an alternative representation would be to send a single parameter with a a unit of zero to indicate all gear is in an up position. The attributes of the message are as follows:

src id:

UINT16; This value was set to 2222 decimal at installation time.

message number:

UINT16; 3400 decimal for illustration purposes.

msg class:

UINT8; "OP" value 3 decimal.

message ID:

UINT8; FLIGHTDATA decimal 2

flags:

UINT16; LEVEL-A decimal 5; See .

tcid:

t-NONE; See .

len:

UINT16 ; 0x20 octets.

Parameter (First):

Unit:

UINT16; Decimal 1 for landing gear unit 1

SubUnit:

UINT16; 0

Parameter Data Len:

11 bits; decimal 4.

Ident:

21 bits; LDGGEAR - Landing Gear State, value %x00.00.b2 See .

Format:

UINT (OCTET): decimal 2. See .

Confidence:

decimal 10 (OCTET): RAW. It is the value reported by the actuator. See .

Expire:

OCTET; Time to live. %x77 to expire in 2.9 seconds. See for encoding.

Pflags:

LEVEL-A (OCTET) decimal 5. See

Parameter Data:

*(OCTET) value is 0x8000.

Parameter (Second):

Unit:

UINT16; Decimal 2 for landing gear unit 2

SubUnit:

UINT16; 0

Parameter Data Len:

11 bits; decimal 4.

Ident:

21 bits; LDGGEAR - Landing Gear State, value %x00.00.b2 See .

Format:

UINT (OCTET): decimal 2. See .

Confidence:

decimal 10 (OCTET): RAW. It is the value reported by the actuator. See .

Expire:

OCTET; Time to live. %x77 to expire in 2.9 seconds. See for encoding.

Pflags:

LEVEL-A (OCTET) decimal 5. See

Parameter Data:

*(OCTET) value is 0x8000.

Gear Position Request

Request Gear Position Down 1 2 3 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | src id | message number | | 1001 | 2001 | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | msg class | message ID | flags | | 3 = OP | FLIGHTDATA 2 | LEVEL-A 5 | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | tcid | len | | NONE 0 | %x10 | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Unit | SubUnit | | 0 | 0 | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Parameter Data Len | Ident | | 4 | LDGGEARREQ %x00.00.b3 | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Format | Confidence | Expire | Pflags | | UINT 2 | RAW / R 10 | %x00 | LEVEL-A 5 | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ : Parameter Data : | 0x0001, down. | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+

Below we see an example message that could have been made by a landing gear button.

src id:

UINT16; This value was set to 1001 decimal at installation time.

message number:

UINT16; 2001 decimal for illustration purposes.

msg class:

UINT8; "OP" value 3 decimal.

message ID:

UINT8; FLIGHTDATA decimal 2

flags:

UINT16; LEVEL-A decimal 5; See .

tcid:

t-NONE; See .

len:

UINT16 ; 0x10 or 16 decimal octets.

Parameter (Only):

Unit:

UINT16; Decimal 0 for the plane's landing gear.

SubUnit:

UINT16; 0

Parameter Data Len:

11 bits; decimal 4.

Ident:

21 bits; LDGGEARREQ - Landing Gear State Request, value %x00.00.b3 See .

Format:

UINT (OCTET): decimal 2. See .

Confidence:

decimal 192 (OCTET): USERSEL. See .

Expire:

OCTET; Time to live. %x00 to not expire. See for encoding.

Pflags:

LEVEL-A (OCTET) decimal 5. See

Parameter Data:

*(OCTET) 0x0001, down.

First Changed Gear State Message

First Changed Gear State Message 1 2 3 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | src id | message number | | 2222 | 3401 | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | msg class | message ID | flags | | 3 = OP | FLIGHTDATA 2 | LEVEL-A 5 | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | tcid | len | | NONE 0 | %x20 | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Unit | SubUnit | | 1 | 0 | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Parameter Data Len | Ident | | 4 | LDGGEAR %x00.00.b2 | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Format | Confidence | Expire | Pflags | | UINT 2 | RAW / R 10 | %x77 | LEVEL-A 5 | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ : Parameter Data : | 0x3901, in transit | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Unit | SubUnit | | 2 | 0 | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Parameter Data Len | Ident | | 4 | LDGGEAR %x00.00.b2 | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Format | Confidence | Expire | Pflags | | UINT 2 | RAW / R 10 | %x77 | LEVEL-A 5 | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ : Parameter Data : | 0x4121, in transit | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+

The above message was sent while the landing gear was in transit. It shows the position values for each gear to be different, but both in transit. The expiry is set to 0x77 and about 2.9 seconds as the sending node intends to send updates at least once per second. The longer time period accounting for potential losses.

src id:

UINT16; This value was set to 2222 decimal at installation time.

message number:

UINT16; 3401 decimal for illustration purposes.

msg class:

UINT8; "OP" value 3 decimal.

message ID:

UINT8; FLIGHTDATA decimal 2

flags:

UINT16; LEVEL-A decimal 5; See .

tcid:

t-NONE; See .

len:

UINT16 ; 0x20 octets.

Parameter (First):

Unit:

UINT16; Decimal 1 for landing gear unit 1

SubUnit:

UINT16; 0

Parameter Data Len:

11 bits; decimal 4.

Ident:

21 bits; LDGGEAR - Landing Gear State, value %x00.00.b2 See .

Format:

UINT (OCTET): decimal 2. See .

Confidence:

decimal 10 (OCTET): RAW. It is the value reported by the actuator. See .

Expire:

OCTET; Time to live. %x77 to expire in 2.9 seconds. See for encoding.

Pflags:

LEVEL-A (OCTET) decimal 5. See

Parameter Data:

*(OCTET) value is 0x3901, in transit .

Parameter (Second):

Unit:

UINT16; Decimal 2 for landing gear unit 2

SubUnit:

UINT16; 0

Parameter Data Len:

11 bits; decimal 4.

Ident:

21 bits; LDGGEAR - Landing Gear State, value %x00.00.b2 See .

Format:

UINT (OCTET): decimal 2. See .

Confidence:

decimal 10 (OCTET): RAW. It is the value reported by the actuator. See .

Expire:

OCTET; Time to live. %x77 to expire in 2.9 seconds. See for encoding.

Pflags:

LEVEL-A (OCTET) decimal 5. See

Parameter Data:

*(OCTET) value is 0x4121, in transit.

Final Gear State Message

Final Gear State Message 1 2 3 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | src id | message number | | 2222 | 3402 | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | msg class | message ID | flags | | 3 = OP | FLIGHTDATA 2 | LEVEL-A 5 | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | tcid | len | | NONE 0 | %x20 | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Unit | SubUnit | | 1 | 0 | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Parameter Data Len | Ident | | 4 | LDGGEAR %x00.00.b2 | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Format | Confidence | Expire | Pflags | | UINT 2 | RAW / R 10 | %xDB | LEVEL-A 5 | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ : Parameter Data : | 0x0001, down. | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Unit | SubUnit | | 2 | 0 | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Parameter Data Len | Ident | | 4 | LDGGEAR %x00.00.b2 | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Format | Confidence | Expire | Pflags | | UINT 2 | RAW / R 10 | %xDB | LEVEL-A 5 | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ : Parameter Data : | 0x0001, down. | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+

The mesage above indicates that both landing gear are down (value 0x0001) and the message expiry has increased to 0xDB, or about 59 seconds. Since the gear are now in a static position, the node only intends to send updates every 20 seconds or so following the expire a message at about three times the sending frequency. In practice, to ensure delivery the long expiry should be introduced after at least one prior notification that it reached that state.

src id:

UINT16; This value was set to 2222 decimal at installation time.

message number:

UINT16; 3402 decimal for illustration purposes.

msg class:

UINT8; "OP" value 3 decimal.

message ID:

UINT8; FLIGHTDATA decimal 2

flags:

UINT16; LEVEL-A decimal 5; See .

tcid:

t-NONE; See .

len:

UINT16 ; 0x20 octets.

Parameter (First):

Unit:

UINT16; Decimal 1 for landing gear unit 1

SubUnit:

UINT16; 0

Parameter Data Len:

11 bits; decimal 4.

Ident:

21 bits; LDGGEAR - Landing Gear State, value %x00.00.b2 See .

Format:

UINT (OCTET): decimal 2. See .

Confidence:

decimal 10 (OCTET): RAW. It is the value reported by the actuator. See .

Expire:

OCTET; Time to live. %x77 to expire in 2.9 seconds. See for encoding.

Pflags:

LEVEL-A (OCTET) decimal 5. See

Parameter Data:

*(OCTET) value is 0x0001, down.

Parameter (Second):

Unit:

UINT16; Decimal 2 for landing gear unit 2

SubUnit:

UINT16; 0

Parameter Data Len:

11 bits; decimal 4.

Ident:

21 bits; LDGGEAR - Landing Gear State, value %x00.00.b2 See .

Format:

UINT (OCTET): decimal 2. See .

Confidence:

decimal 10 (OCTET): RAW. It is the value reported by the actuator. See .

Expire:

OCTET; Time to live. %x77 to expire in 2.9 seconds. See for encoding.

Pflags:

LEVEL-A (OCTET) decimal 5. See

Parameter Data:

*(OCTET) value is 0x0001, down.

IANA Considerations This memo includes no request to IANA.

Security Considerations This document should not affect the security of the Internet. This protocol is currently designed to be deployed on an isolated private network. As such, message encryption, authenticity, and modification detection are not protocol priorities.

Interception Message Interception is not considered a significant threat for XSEDE because there is no private data in the system.

Impersonation and MITM Impersonation and Man in the Middle (MITM) are unlikely because normally the network is physically isolated and not routed to other networks. Strategies for signing messages are a future consideration.

Denial of Service Due to secure installation and physical isolation, Denial of Service is not a significant concern.

References Normative References This document addresses the internationalization (I18n) of FTP, which includes supporting the multiple character sets and languages found throughout the Internet community. This is achieved by extending the FTP specification and giving recommendations for proper internationalization support. [STANDARDS-TRACK] RFC 2119 specifies common key words that may be used in protocol specifications. This document aims to reduce the ambiguity by clarifying that only UPPERCASE usage of the key words have the defined special meanings. IEEE RTCA - Radio Technical Commission for Aeronautics Garmin International, Inc. Informative References This document provides guidance for the Internet Assigned Numbers Authority (IANA) in assigning IPv4 multicast addresses. It obsoletes RFC 3171 and RFC 3138 and updates RFC 2780. This memo documents an Internet Best Current Practice. In many standards track documents several words are used to signify the requirements in the specification. These words are often capitalized. This document defines these words as they should be interpreted in IETF documents. This document specifies an Internet Best Current Practices for the Internet Community, and requests discussion and suggestions for improvements.