— 21 —
If one network includes several chart plotters, turn off all of them except the one from which you
will program the Device. If multiple Devices are connected to the network, they will be programmed
at the same time.
The Device confirms commands received from the chart plotter by lighting LEDs for 3 seconds once
or repeatedly. If you are not able to see the Device LED when sitting behind the chart plotter,
you may need an assistant.
Programming the Device is performed either by a sequential change of chart datum settings, or sequential
change of the magnetic variation settings on the chart plotter. Older models of Raymarine plotters
do not send notifications when changing the magnetic variation (NMEA 2000 message with PGN 127258)
and only the first method is available for them. Garmin plotters do not send notifications when the chart
datum is changed (NMEA 2000 message with PGN 129044) and only the second method is available
for them.
To select a programming method, refer to the documentation of your chart plotter. In some cases you
may need to update the plotter firmware.
STEP 1. Putting the Device into standby mode
The Device enters standby mode if, when it is switched on, the chart datum is set on the plotter
to “Ireland 1965” or if the magnetic variation on the plotter is set to a user-defined value of 26°E.
Usually, the plotter sends notifications on settings every 20 seconds. When changing the setting
on the plotter as mentioned above, do not forget the initial configuration of the plotter. Cycle the Device
power. Within a minute after the Device is turned on, it will produce a confirmation signal (LED will
light up for 3 seconds). This means that the Device is put into standby mode. If the Device power
is turned off along with the plotter power, the wait time for the signal will be increased
by the plotter loading time.
If after some time the setting on the plotter automatically returns to the previous value,
that is an indication that there is another device on the network sending notifications.
It may be an NMEA0183-NMEA2000 converter, another plotter, or a computer connected
to the NMEA 2000 network. Turn off the power of this device or disconnect it from the NMEA 2000 bus
at the time of programming. It is recommended to disconnect any such device from the bus when the bus
power is off.
