V A L A V I O N I C S L T D
I N S 4 2 9 I N T E G R A T E D N A V I G A T I O N S Y S T E M
I N S T A L L A T I O N A N D O P E R A T O R ’ S M A N U A L
Revision 3
Page 19 of 27
March 2013
9.6
Message Definitions
9.6.1
Input Messages
REQUEST DATA OUTPUT
This input is used to request an output message to be sent by the INS 429 / COM 2000.
Message format:
“V” ...............................Message class. This is a VHF NAV message.
“24” ..............................Message identifier.
ii ....................................Output identifier of requested message, two ASCII characters.
dd...................................Message data, two encoded hex
2
characters (30h-3Fh), used for specific output
request. Set to “00” if not needed. These characters are used for such items as
selecting a specific EEPROM address to output.
A....................................Request type: (ASCII) “0”= output repeatedly at low speed (1 Hz); “H” = output
repeatedly at high speed (10 Hz).
ii
Output
Dd
Data Description
a
“20”
Reset Status
“00”
“0”
“21”
CDI, GSI, and Flags
“00”
“0”, “L”, “H”
“22”
Decoded OBS Setting
“00”
“0”, “L”, “H”
“23”
Radial from Active VOR
“00”
“0”, “L”
“28”
Receiver Status
“00”
“0”
“30”
NAV Microntroller Software Version
“00”
“0”
“32”
ADC Data Output
cc
ADC channel: “00”
to “08”
“0”
“35”
Comm Transceiver Status
“00”
“0”
“36”
Comm Software Version
“00”
“0”
“71”
Comm Volume and Squelch
“00”
“0”, “L”
“72”
Comm Mic Gain and Sidetone
“00”
“0”
Table 5 -
Data Output Requests
Example messages:
$PMRRV242100L<chksm><CR><LF>
Request periodic output of CDI, GSI, and related flags at low (1Hz) rate.
$PMRRV2432050<chksm><CR><LF>
Request a single output of ADC data from channel 5.
2
Encoded Hex: each character consists of 4 bits of data placed in the low order 30h. For example, the 8-bit
value of 5Fh would be encoded as two characters with values of 35h and 3Fh, which map to the ASCII characters
“5” and “?” respectively.
