cjh
Member
I have a PLC 5/20 that has been sitting on our shelf. I just plugged it up and tried to connect to it with RS Logix. It is asking me for a password. I know for a fact that it has never been given a password. I seem to recall that you could jumper something to get rid of the program in the PLC 5. Does anyone know what effect jumping these jumper pins will have on the CPU? If it only clears the program, this is no problem. I am just concerned that it may also clear the firmware. Please advise if you know the answer.