chipmoseley
Member
I am trying to dynamically update the running PLC clock in a A/B PLC-5/30 to keep it synched with a controlling time from a master computer. I have the same program running in three different PLC5's but the clock only updates in two of the PLC's. When I move values into S:18 thru S:23, the clock does not actually change. Does anyone know anything that will prevent the clock from updating?