JRC JLN-900 - Page 241

11-9
3.1.4 Alert sentence (--ALF)
This sentence is used to report an alert condition and the alert state of a device.
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$--ALF,x,x,x,hhmmss.ss,A,A,A,AAA,x.x,x.x,x.x,x,c-c*hh <CR><LF>
Field # Field Type Definition Note
1
--
Talker id VD = Log, VR = VDR,
SD = Depth Sounder
2
X
No. of ALF sentences in message 1 to 2
3
X
Sentence number 1 to 2
4
X
Sequential message identifier 0 to 9
5
hhmmss.ss
Time of alarm condition UTC
6
A
Alert category A: ES
B: SDME
C:
7
A
Alert priority A: Alarm
W: Warning
C: Caution
8
A
Alert state V: active - unacknowledged
S: active - silenced
A: active – acknowledged
O: active – responsibility
transferred
U: rectified - unacknowledged
N: normal
9
AAA
Manufacturer mnemonic code SAL
10
x.x
Alert identifier Log: 20000 + PSALW no.
VDR: 10000 + Alarm no.
11
x.x
Alert instance 1 to 999999
12
x.x
Revision counter 1 to 99
13
X
Escalation counter 0 to 9
14
c—c
Alarm’s description text
15
Hh
Check sum