I'm not sure if this is the right place to ask this question, but on a Fanuc control what does the 0V side do, it's usually tied in with the 24V. I have been having problems with a turret count proximity switch on a Citizens F-16.

With the 0v wire disconnected (also has 24V and output wire) I get a signal from the switch, and with it connected I get nothing. Either way it doesn't react to the cam that moves past it to create the count signal.

I had another switch in there that was working, but intermittenly the machine would stop and I had to write the turret position in MDI or it wouldn't sense the right turret count and not engage the shot pin.

Any ideas?

Thanks