AB OB16E Electronic Fuse Tripping


Thread Starter


I am getting a Fuse LED lit up on my 1756-OB16E output module when running a particular piece of ladder. I can create another program and will not see the fuse trip. I was under the impression that the indication was only for a current overload on the card. I'm curious what in the ladder can cause a fuse to trip?


Bob Peterson

I don't think the PLC can make it trip. However, it might be possible that what the code is doing, maybe unintentionally, is causing the overload condition.

For instance, if your code was pulsing the output instead of turning it on and leaving it on, that might cause an overload.

If you are telling the whole story this has the trappings of being a bug in the code.