Realtime clock for PLC AC500
My system running follow realtime clock, PLC AC500 don't have battery (have memory cards), when loss power and supply power again, My program use RTC block and I'm set "PDT" is DT#2013-08-19-14:00:00", when run PLC again, realtime to be set DT#2013-08-19-14:00:00, so that system will run but not correct!I want to when loss power (without batrery), realtime clock wil run correct! How to do solve this problem? Please help me about this!
Thank so much!
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Actually, there is one optional battery option named TA561-RTC. This is what you really need if you dont have any external way of time synchronizing. Without a battery nothing can preserve the RTClock after a CPU power off...