active Posted February 4, 2017 Report Share Posted February 4, 2017 Hi All Has anybody had the following issue losing MI Values in programs all reset back to zero for no apparent reason have not set MI to change to zero on power up have cycled power numerous times on plc doesn't do it, not anywhere in programs am I resetting. Happening at 3 different sites, completely different programs. One site happened 2 years of running fine after install. One was running off of generator supply. Only happens to MI that are either keypad entry or used to manipulate data in the program. Using switch mode power supply to power plcs, have replaced backup battery even though not getting battery low alarm SB8 Still happens - only common thing across sites is that they are either out in the country or at a mining site powered by generator. Quote Link to comment Share on other sites More sharing options...
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