At shift change, I wrote a 1 back to an OPC tag to reset some timers and counters. I then have a handshake to acknowledge this at the PLC a set this bit low. I encountered a situation today where the controller was powered off when the tag went high, and when the controller came back on it did not change that bit.
I assume this is because the tag does not continuously write. Does antone have a suggestion for how to achieve this? Thanks!