JMC NT–2000 - Alarm Output Sentence Format; Alarm Acknowledgement

NT-2000 REF Manual
Installation
7-17
7.4.3. Alarm Output Sentence Format
The following format sentence is output to the RS–422 port to report the reception of a
warning NAVTEX message or the current alarm condition or to indicate an equipment
failure or malfunction.
$CRALR
,,
003
,
A
,
V
,
NAVTEX:Search and Rescue information
*
72<CR><LF>
① ② ③ ④ ⑤
① Local alarm number:
001 = Navigational warning (type A message)
002 = Meteorological warning (type B message)
003 = Search and rescue information (type D message)
004 = Receiver malfunction
005 = Self–diagnostic test failure
006 = General failure
② Alarm conditions:
A= threshold exceeded (
i.e. alarm condition exists)
V= threshold not exceeded (
i.e. alarm condition is non–existent)
③ Alarm acknowledgement status
A= acknowledged
V= unacknowledged
④ Alarm description text
⑤ Checksum:
03 = Navigational warning
0F = Meteorological warning
72 = Search and rescue information
72 = General failure –
NOTE: The equipment does not use UTC as the time source, and therefore sends a null field
in place of the time–of–alarm–condition–change field.
7.4.4. Alarm Acknowledgement
The following command is supported to externally acknowledge/stop the current
message alarm:
$– –ACK
,
003
*
hh<CR><LF>
① ②
① Local alarm number
001 = Navigational warning
002 = Meteorological warning
003 = Search and rescue information
② Checksum:
If the device identifier is IN (INS), the above command is as follows:
$INACK
,
003
*
51<CR><LF>