I have a zero plate input giving me problems. I have connected the wire properly and when I touch the zero plate to the bit the input light one comes on like it should. When I run the zero plate routine the error message cannot clear z-input contact. When I run the zero plate routine I make sure that input one is off before I run it. I have the clip on the machine and I know I am getting a good contact. I have tried reversing the wires as suggested in earlier post but that did not fix the problem.

Now I wonder if it is something to do with the circuit board wiring. I have zero plate wire into the number one input and I have the clip into the ground. I also have the prox switches sharing the ground in the circuit board. Could that be the problem?

Any suggestions?
Thanks,
TT