Hi guys, I was looking at a fault in a micrologix 1000, " lost retentive memory " I reloaded program and was back in business. The electrical supply is a little suspect in this plant so I installed a noise filter when I built the panel, and installed a surge protector after this last fault. when I turned on the surge protector I bobbled the switch on and off a few times, and faulted the processor for good. No communication at all. I installed a new processor and works fine.This is the second time a processor has had a fatal fault, first time due to power outage from storm. Are these processors that finnicky, and should I have a battery back up? Thankyou