-Is the NMEA2000 connector properly fitted to the unit?
-Do you have power on the NMEA2000 backbone?
-Is the NMEA2000 backbone is properly terminated?

Unit does not have any connection with the network, check the NMEA2000 network.
-Check network power.
-Check NMEA2000 termination. The network shall have two terminators installed. To be certain you can power OFF the system and measure OHM between pin 4 and 5 (standard Micro C connector). A proper terminated network has 60 Ohm (two 120 Ohm terminator in parallell).

Check ‘Code explanation DCM & MCU’ documentation for more information.
Code explanation DCM & MCU

A system with only DCM modules only one can be master, the unit that switches between ID number and CUA is programmed as master.
If you have an MCU in the system, that one is naturally master in the system.
A rare case can occur if you have replaced a DCM with another DCM unit that previously has been programmed as master. The unit will stay acting as a master even if re-programmed.
This can be seen this when the units are power-cycled, the unit still acting as master takes longer time to power up. To remove master mode from a unit you need the program it with an empty configuration file.

The polarity on the power cables are shifted (plus/minus).

This means that the units doesn’t recognize a master
Check that the NMEA2000 network is properly terminated/connected and powered.

If the option is greyed out there is a master unit missing in the configuration file. Update configuration.
Check that all the units have the latest firmware by performing a firmware upgrade.

If the system has firmware that has not been updated for a long time there might be a need for several retries before the firmware upgrade is successful.
If you have an MCU in the system -start upgrading that units first. Select the master unit separately and perform the upgrade.

The units are still in bootloader mode during a cancelled or failed upgrade of firmware.
Try to upgrade the unit again through Empirbus studio.

-Check connections and that the resistors are attached and OK.
-Check that the correct type of resistors are attached: 68 ohm if its a multi-switch and 120 ohm if it’s a dual fixed multi-switch.
-Check the input channel that the LED turns green when the button in pressed.
Note: only pulse breakers will work with a multi-switch input channel.

-If it’s a new config please check that you have the correct fuse setting on the channel.
-The unit attached to the output channel consumes to much power/current.

-Check that all units have power and COM led flashes green.
-Upgrade MCU to latest firmware, followed by the rest of the units in the system.

-Access P10 on your MCU: Hold ‘enter’ for approx. 10 sec until P10 appears (a beep sound shall be heard during the whole process). Release and press enter one time.
-Copying is done in the P10 menu of the MCU. Copy function 1 (CF1) copies from DCM to MCU and copy function 2 (CF2) from MCU to DCM. Number 2 is to be used in this case as you’d like to copy from MCU to DCM.
-Verify that the MCU (and/or DCM) doesn’t say ‘EoA’ before copying as this indicates that there is an existing conflict of stored switches and a decision has to be made what set of switches to use.

-Press and hold button 7 for about 20 seconds whilst applying power
-Press button 8 three times, now a number will be displayed instead also flashing, this is the base address.
-Use the button 5 and 6 to step down and up the base address.
-When the new base address have been set press and hold button 7 again for about 20 seconds to store.
-The way the base address is displayed on the membrane panel is as follows:
Indication on button 1 is 0 or 1, 0 when off and 1 when lit.
Indication on button 2 is 0 or 2, 0 when off and 2 when lit.
Indication on button 3 is 0 or 4, 0 when off and 4 when lit.
Indication on button 4 is 0 or 8, 0 when off and 8 when lit.
Indication on button 5 is 0 or 16, 0 when off and 16 when lit.
Indication on button 6 is 0 or 32, 0 when off and 32 when lit.
Indication on button 7 is 0 or 64, 0 when off and 64 when lit.
Indication on button 8 is 0 or 128, 0 when off and 128 when lit.
The base address will be the sum of the indicators lit up.

For Example, if Indication on Button 1 + Button 3 => Address is 1+4 = 5.

-Check that all units have the latest firmware installed. Firmware NXT
-Verify that you have not programmed a channel with functions that it doesn’t support:
Fuse settings, channel support on your unit (example: an input channel has been programmed as an output channel), specific channel support under it’s properties.
-Check that the system doesn’t have two masters.

The fuse has tripped, please reset directly on the uni. See manual for resetting fuse.
EmpirBus NXT
If you control the system with an Raymarine MFD you can reset fuses from the meny ‘tripped circuits’.

Follow the guide found on the ‘support’ page for installing wipers/diodes.
Support

IMPORTANT!!! Caution shall be taken during this process due to a major risk of damaging the mechanical buttons on the panel. Damaged SP12 panels as a result of button removal will NOT be covered by warranty.

The settings of SP12 panel termination shall be decided and done before the buttons are attached. If you are expanding the network please follow the steps below.

-The button numbers follows from left to right and begins with 1 at the top left corner.
-The termination switch is placed under button 8 on the portrait model and under button 5 on the landscape model.
-Remove the button by following the guide for button removal, found on the ‘support’ page. Support
-On the PCB you will find a microswitch with the numbers 1 and 2. These are the two terminators you can set to ON or OFF (activate/deactivate).
With an expanded network above 6 meter one of the above shall be ON and the other termination placed at the other end of the NMEA2000 network. Alternatively you can set them both to OFF and have the two terminators placed separately in the NMEA2000 backbone.

Follow the guide found on the ‘support’ page for EmpirBus Studio.
Support

Follow the guide found on the ‘support’ page for installing RMDS files on the Raymarine MFD.
Support