Hi guys this is my first post on this forum but I have been a long time browser.
I have this issue with a micrologix 1500, it's a strange one. The other day I'm looking at the code, I see a bit is on however it's unlatch condition had just been driven but it didn't unlatch. The latch condition was not being driven yet it wouldn't unlatch. The ladder was being called and I couldn't see any reason why it wouldn't turn the bit off. I started to think there was a problem with the PLC.
I re-downloaded the whole program and it was fine again. Now a week later the PLC has just wiped itself clean no faults and no program. Re-download the program and it's fine again. Thinking about replacing the PLC. Has anyone ever seen anything like this ???
** Edit :- Also no battery light and apparently power was not cycled to the PLC either.
Thanks,
Tony.
I have this issue with a micrologix 1500, it's a strange one. The other day I'm looking at the code, I see a bit is on however it's unlatch condition had just been driven but it didn't unlatch. The latch condition was not being driven yet it wouldn't unlatch. The ladder was being called and I couldn't see any reason why it wouldn't turn the bit off. I started to think there was a problem with the PLC.
I re-downloaded the whole program and it was fine again. Now a week later the PLC has just wiped itself clean no faults and no program. Re-download the program and it's fine again. Thinking about replacing the PLC. Has anyone ever seen anything like this ???
** Edit :- Also no battery light and apparently power was not cycled to the PLC either.
Thanks,
Tony.