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Appendix, Digital interface – Furuno RP180 User Manual

Page 88

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AP-1

APPENDIX

1. Digital Interface

Input sentences (RP board, J2)

VDM, ALR, VDO

Data reception

Data is received in serial asynchronous form in accordance with the standard referenced in
IEC 61162-2.

The following parameters are used:
Baud rate: 38400, Data bits: 8 (D7 = 0), Parity: none, Stop bits: 1

D0 D1 D2 D3 D4 D5 D6 D7

Start
bit

Stop
bit

Data bits

Data sentences

ALR –Set alarm state

$AIALR,hhmmss.ss,xxx,A,A,c--c*hh
| | | | | |
| | | | | +----------------- 6
| | | | +----------------- 5
| | | +-------------------- 4
| | +---------------------- 3
| +------------------------- 2
+--------------------------------- 1

1. Time of alarm condition change, UTC
2. Local alarm number(identifier)
3. Alarm condition(A=threshold exceeded, V=not exceeded)
4. Alarm’s acknowledge state, A=acknowledged V=unacknowledged
5. Alarm’s description text
6. Checksum