List of Contributions

We earlier had the issue with the program being lost each time we switched the power off to the PLC. We replaced the backup battery initially and then the CPU memory module. We then replaced the PSU which cured the issue with losing the program. I did notice that when we replaced the memory module when ...

The PSU was replaced and this now prevents the program from being lost each time the power i recycled to the machine. However when we power up the PLC shows a major error which can only be reset by connecting the laptop and resetting. The error is S:1/13 (Incompatible user program - Operating system ...

Thanks for the quick reply. I don't think it's the PSU as the fault only occurs when the power to the machine is switched off. I'd expect the battery in the CPU card should allow the program to be retained each time the power is switched off? There is also a capacitor on the CPU which keeps the power ...

I have a 1747-L541 PLC which is losing its program every time the power is switched off to the machine. When the power is reinstated the FLT lamp stays on solid. This then does not allow be to get online to the PLC via my laptop. I now have to recycle the power to the PLC again which then means ...