Alphatron ALPHA BNWAS - 5 VDR Communication Interface; NMEA Communication Parameters; NMEA Data Message Format

A ALPHA BNWAS
11
5 VDR COMMUNICATION INTERFACE
The AlphaBNWAS is equipped with an RS485 interface intended to relay
all available information of the watch alarm to the VDR (Voyage Data
Recorder). The protocol to export data is NMEA, and is supported by
almost every VDR. Messages are send every second. The communication
parameters and the data message is explained in the following tables.
Parameters communication interface:
Protocol
NMEA
Interface
RS485
Baudrate
4800
Data bits
8
Parity
None
Stop bits
1
NMEA message
$ABWA,x1,x2,x3,x4,x5,x6,x7,x8,x9,x10,x11*<CRC>
Character
Description
A
Alphatron
B
Bridge
W
Watch
A
Alarm
X1
On mode
X2
Auto mode
X3
Off mode
X4
0/1 , 3 minutes/12 minutes
X5
Key switch deselect/set
X6
Reset button operated
X7
Emergency call operated
X8
Watch time running
X9
Reached bridge alarm level
X10
Reached call officer level
X11
Reached call crew level
* Character X1 – X11 = 0 or 1