cardosocea
Member
Did you check for any grounding issues from the panel to the prox?
Did all the other inputs on that bank worked?
Did all the other inputs on that bank worked?
tighten all terminals and see if the problem goes away.
then stress test the wiring by pulling on it. you may have a connection that is corroded and about to break.
james
I identified that the PLC input, itself, had to be the culprit. I was able to do this by lifting the wire from the "bad" input and touching it to a known "good" input. Doing this, prox works again and a signal is received by the PLC. Putting it back on it's original input, however - nothing.
By that statement it would seem any field wiring or components would already be ruled out as the source of your problem, would it not?
BCS
It should have, yes, but sadly, no. While my statement suggests I lifted the wire and touched "directly" at the input card itself, that unfortunatley was not the case. In fact, the lifting and touching was done in a nearby - but none the less - remote terminal enclosure. As I said in my most recent post, I did not do as thorough of a job troubleshooting, nor it now seems, did I do such a good job describing what I actually did.By that statement it would seem any field wiring or components would already be ruled out as the source of your problem, would it not?
BCS
My card does not have the SECOND common landed. According to original schematics.... it NEVER was. But somehow, Inputs 12, 14, and 15 worked in the past.... ANYWAY.
BIG QUESTION.... why does input 12 need that 2nd common.... NOW???
No LED on the PROX
2 wire prox need a load to work the input of a plc will not load it enough to power it.
install a resister or a lamp in plc input / prox output
I have seen this many times that's why I don't like 2 wire devices there load sanative