Furuno RP-250 manual Appendix, Digital Interface IEC, Input sentences RP Board, J4, Data reception

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

D2

D3

D4

D5

D6

D7

Start

Stop

Data bits

bit

bit

Data sentences

ALR –Set alarm state

$AIALR,hhmmss.ss,xxx,A,A,c

--

c*hh<CR><LF>

+-----------------

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

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

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