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AE–1800 Instruction Manual
Installation
7.4.4. Alarm Output Sentence Formats
7.4.4.1.
Output Format for Alarm Being Activated
An alarm output sentence like the example below will be output to the
RS–422
(INS)
port when the equipment receives an alarm NAVTEX message or if the equipment
develops a failure or malfunction. The output will be repeatedly available at 30–second
intervals until the alarm condition is acknowledged and reset manually by pressing
twice
*
1
on the equipment or until the appropriate acknowledgement command
(paragraph 7.4.5) is fed via the port from the INS terminal.
$CRALR
,,
003
,
A
,
V
,
NAVTE
X
:
Search and Rescue information
*
72<
CR
> <
LF
>
①
②
③
④
⑤
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.
①
Local alarm number:
001 = Navigational warning (type–A message)
002 = Meteorological warning (type–B message)
003 = SAR, piracy, armed robbery 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 = SAR, piracy and armed robbery information
The other alarm output sentences are as follows:
$CRALR
,,
001
,
A
,
V
,
NAVTEX:Navigational warning
*
03<
CR
> <
LF
>
$CRALR
,,
002
,
A
,
V
,
NAVTEX:Meteorological warning
*
0F<
CR
> <
LF
>
*
1
:
Pressing the key once silences the audible indication alone, allowing the output sentence to
continue every 30 seconds. A second keypress resets all the currently active alarms.
7.4.4.2.
Output Format for Alarm Being Acknow ledged
When active alarms are acknowledged, the following sentences will be output once:
$CRALR
,,
001
,
V
,
A
,
NAVTE
X
:Navigational warning
*
03<
CR
> <
LF
>
$CRALR
,,
002
,
V
,
A
,
NAVTE
X
:Meteorological warning
*
0F<
CR
> <
LF
>
$CRALR
,,
003
,
V
,
A
,
NAVTE
X
:
Search and Rescue information
*
72<
CR
> <
LF
>