AP-2
APPENDIX 2 DIGITAL INTERFACE
Priority for input data/sentences
Priority for ports
LAN > Serial (CH1) > Serial (CH2)
Digital Interface
• Input sentences: ACN, GGA, RMC, VTG, ZDA
• Output sentences: ALC, ALF, ALR, POS, VBW, VHW, VLW
• Transmission interval: 1 s for VBW, VHW, VLW
• Data transmission
Data is transmitted in serial asynchronous form in accordance with the standard referenced in
2.1 of IEC 61162-1/2. The first bit is a start bit and is followed by data bits, least-significant-bit
as illustrated below.
The following parameters are used:
Baud rate: 38400 bps/4800 bps
Data bits: 8 (D7 = 0), parity none
Stop bits: 1
• Data digit
The ship’s speed data (VBW, VHW) has two digits after the decimal point (default setting). To
change digit after the decimal point, set S4 of the DIP switch to ON on the DST board of the
distributor unit.
Sentence (Priority) Contents
GNS>GGA>RMC>GLL Position
VTG>RMC Speed over ground
VTG>RMC Course over ground
ZDA Date
D0 D1 D2 D3 D4 D5 D6 D7
Start
bit
Stop
bit
Data bits
DST board 65P6110
LIF board
65P6111
DIP switchDIP switch
S4S4
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