Furuno FM-8900S Operator's Manual page 120

APPENDIX 4 DIGITAL INTERFACE
• ALF
$CVALF,x,x,x,hhmmss.ss,a,a,a,aaa,x.x,x.x,x.x,x,c--c,*hh<CR><LF>
1 2 3 4
1. Total number of ALF sentences this message (1, 2)
2. Sentence number (1, 2)
3. Sequential message identifier (0 to 9)
4. Time of last change
5. Alert category (A=Alert category A, B=Alert category B, C=Alert category C, NULL)
6. Alert priority (E=Emergency Alarm, A=Alarm, W=Warning, C=Caution, NULL)
7. Alert state
V=Active, unacknowledged
S=Active, silenced
A=Active, acknowledged(or active)
O=Active, responsibility transferred
U=Rectified, unacknowledged
N=Normal
NULL
8. Manufacturer mnemonic code
9. Alert identifier
10. Alert instance (1 to 999999, NULL)
11. Revision counter (1 to 99)
12. Escalation counter (0 to 9)
13. Alert text
• ARC
$CVARC,hhmmss.ss,aaa,x.x,x.x,c*hh<CR><LF>
1 2
1. Release time of the Alert Command Refused(UTC)
2. Manufacturer mnemonic code
3. Alert identifier
4. The alert instance(1 to 999999, NULL)
5. Refused Alert Command(A, Q, O, S)
A=acknowledge
Q=request/repeat information
O=responsibility transfer
S=silence
• HBT
$CVHBT,x.x,A,x*hh<CR><LF>
1 2 3
1. Configured repeat interval (1 to 999, NULL)
2. Equipment status (A=Normal V=System fail)
3. Sequential sequence identifier (0 to 9)
AP-20
5 6 7 8 9 10 11 12 13
3 4 5