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 29 of 31
May 2013
COMMUNICATIONS ERROR
This message is used to indicate a communication error.
Message format:
“V” ..................... Message class. This is a VHF NAV message.
“27” .................... Message identifier.
e.......................... Error code: (ASCII)
“0” = input message checksum error.
“1” = unknown message.
“2” = error or mismatch in message data.
Example message:
$PMRRV271<chksm><CR><LF>
Received an unknown message.
NAV RECEIVER STATUS
This message is used to output the current status of the NAV receiver. It will be output upon request or
whenever the status changes.
Message format:
“V” ..................... Message class. This is a VHF NAV message
“28” .................... Message identifier
mk ...................... Standby NAV frequency: m = MHz, where m + 30h = desired MHz frequency
in the range of 108 to 117 MHz. k= (desired frequency / 25 kHz) + 30h, with
desired frequency in range of 000 to 975 kHz in 50 kHz steps.
s.......................... Status: “N” = Normal mode, “M” = Monitor mode
Example message:
$PMRRV28E4?PM<chksm><CR><LF>
Active NAV frequency is 117.100 MHz, Standby NAV frequency is 111.800 MHz, receiver is in monitor
mode.
NAV
M
ICROCONTROLLER
S
OFTWARE
V
ERSION
This message is used to output the version string for the NAV microcontroller software.
Message format:
“V” ..................... Message class. This is a VHF NAV message.
“30” .................... Message identifier.
vvvv ................... Software version in ASCII
e.......................... Engineering version flag:
“R” = Released version.
“E” = Engineering version.
Example message:
$PMRRV300103E<chksm><CR><LF>
NAV Microcontroller software is version 1.03. It is an engineering version.
