D
We have a PLC5 with a new analog input card added to it---this PLC is on remote IO. There are two PLC's controlling this one area in our plant. Anyway the analog input card (1771 IFE) just locks up and quits reading our tank levels. To correct it ---or get the analog card to start reading levels again the maintenance tech toggles power on the other remote rack! I can't find anything being sent from the remote rack that would step on the level data in this rack but I can't figure out what toggling power on the other rack does to this analog card either. Any ideas?? I read in a forum somewhere of a similar problem but can't find the article! HELP!! :0)