Appendix; Digital Interface (Iec 61162-2); Input Sentences (Rp Board, J4); Data Reception - Furuno RP-250 Operator's Manual

APPENDIX

1. Digital Interface (IEC 61162-2)

Input sentences (RP Board, J4)

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
Start
bit

Data sentences

ALR –Set alarm state
$AIALR,hhmmss.ss,xxx,A,A,c--c*hh<CR><LF>
| | | |
| | | |
| | | |
| | | +-------------------- 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
VDM – VHF data-link message
!AIVDM,x,x,x,a,s--s,x*hh<CR><LF>
| | | | | | |
| | | | | | +----- 7
| | | | | +----- 6
| | | | +-------- 5
| | | +------------ 4
| | +-------------- 3
| +---------------- 2
+------------------ 1
1. Total number of sentences needed to transfer the message, 1 to 9
2. Message sentence number, 1 to 9
3. Sequential message identifier, 0 to 9
4. AIS channel Number
5. Encapsulated ITU-R M.1371 radio message
6. Number of fill-bits, 0 to 5
7. Checksum
58
D2 D3 D4 D5 D6
Data bits
| |
| +----------------- 6
+----------------- 5
D7
Stop
bit