I have a vacuum furnace running an Allen Bradley SLC 5/03 with a PV 550, I am new to PLC's and using RSLogix 500. My issue is that the control t/c is putting in 900 for instance but then the PLC is spitting out 863. How can I correct this?
It would be the process variable I:8/00 in module 1746-NT4. I am not sure how they could not be activated that is the program the furnace is currently running and everything works fine other than the bad readings on the controller. I know my t/c reads the correct temperature because I have checked it with a handheld and I drove the input with a handheld also that was how I determined it has to be something to do with the PLC.
I am a super beginner on this stuff so I may be misunderstanding what you are saying, but that program was uploaded into the PLC just a couple days ago.