HI all, having issues with the outputs from our KDM20-P controller on our MG series 1. We had a load of buttons that weren't working, they've been swapped out but since then 4 of our buttons no longer "work". The buttons themselves test fine and they've since been swapped out for known working buttons with no luck.

I'm after a bit more information on the two signal cables (TX+RX) and what the receiver in the main cabinet is expecting from/ sending up them from certain button presses. We've got the following 5 cables:
*Em Stop

The four buttons that don't generate signals out of the controller are:

*Set surface
*Set Home
*Set Max depth
*Bar code (1)

Any help would be much appreciated!