What happens to a PLC when it rolls over to an 80s date?

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What will occur to a PLC when it rolls over to a starting date somewhere in the 1980s? Will it shut the system down or will the PLC just keep functioning as if nothing was wrong? Also, while reading Mr. Edgar's response to a post about PC PLCs, another question arose in my mind...If one PLC has a system date of say 1986 and a downstream PLC has a system date of 1987, will this cause any mishaps to occur?

Ben

-- Anonymous, December 07, 1998


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