
CVR–010
Basic Operating Instructions
38
7.8.2. Acknowledging Active Alarms
(3/3)
7.8.2.2. Remote Acknowledgement by Software Commands
(3/3)
7.8.2.2.3. Alert
Acknowledgement
Using IEC 61162–1 Ed. 5 Format Commands
・
A command format like the example below is used to acknowledge an active alert via
one of the
RS–422–A/B
or
I/O
serial interface ports.
Figure 7-28 Format of Alert Acknowledgement Command – Example
$CAACN
,
1
,
JMC
,
230
,
1
,
A
,
C
*
08
< CR > < LF >
①
②
③
④
⑤
⑥
⑦
⑧
①
Device identifier: CA (CA= BAM central alert management function, IN = INS device)
②
Time
field:
null
③
Manufacturer mnemonic code: JMC (= Japan Marina Co. Ltd.)
④
Alert identifier: 230
- 230 = Depth alarm
- 231 = Power failure/low voltage alarm
⑤
Alert instance: null
⑥
Alert command: A ( = acknowledge)
-
A = acknowledge
-
Q = request
- O = transfer responsibility
- S = silence
⑦
Sentence status flag
*
1
: C ( = command)
⑧
Checksum: 08 hex
・
Upon receiving the above formatted command, the echo sounder will stop the visual
alarm, silence the audible alarm and issue the corresponding ALF output sentence
*
2
for
the INS/BAM applications.
*
1
:
Field
⑦
value "C" indicates that this sentence is a command. Without this field, the sentence is not a command
.
*
2
:
Acknowledged alarm ALF sentence; example given in paragraph 13.3.4.5
・
To silence the active audible alarm, the following format command is used:
Figure 7-29 Format of Alert Silence Command – Example
$CAACN
,
1
,
JMC
,
230
,
1
,
S
,
C
*
1A
< CR > < LF >
①
②
③
④
⑤
⑥
⑦
⑧
⑥
Alert command: S ( = silence)
- The visual alarm remains active until the alert condition is rectified.
・
When it is necessary to transfer the alert handling responsibility to other onboard
applications, the following format command is used:
Figure 7-30 Format of Alert Handling Responsibility Transfer Command – Example
$CAACN
,
1
,
JMC
,
230
,
1
,
O
,
C
*
06
< CR > < LF >
①
②
③
④
⑤
⑥
⑦
⑧
⑥
Alert command: O ( = responsibility transferred)
・
Refer to paragraph 13.3.4.5 (Output Data Sentences for IEC 61162–1 Ed. 5 Alert Handling
Protocol) for the corresponding alert output format.
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