Last night I was trying to revive an old derelict machine after a slumber of many years. I couldn't connect to it with 1747-UIC cable from plccable.com (geniusintraining). I tried the UIC devices driver and also DF1 driver under KF3, still no luck.
I assumed it would have lost the program, but apparently, according to the manual the memory module is actually bad, not just missing a program. Power light and fault light both stead ON.
I have a new memory module on order but I'm worried once I get it, I still won't be able to connect to the PLC. Should I be worried? Is this specific failure mode the reason for my being unable to communicate with the PLC?
I assumed it would have lost the program, but apparently, according to the manual the memory module is actually bad, not just missing a program. Power light and fault light both stead ON.
I have a new memory module on order but I'm worried once I get it, I still won't be able to connect to the PLC. Should I be worried? Is this specific failure mode the reason for my being unable to communicate with the PLC?