adccommunitymod (AutomationDirect) asked a question.
Power Loss of PLC
Created Date: October 10,2017
Created By: tpeery
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How do I log an alarm that I have lost power on the Click PLC? I can detect and log an alarm that the power is back up and the PLC is running but I do not know when the power went down. The PLC and Cmore do not share the same power source.
Created Date: October 10,2017
Created by: tpeery
How do I log an alarm that I have lost power on the Click PLC? I can detect and log an alarm that the power is back up and the PLC is running but I do not know when the power went down. The PLC and Cmore do not share the same power source.
Created Date: October 10,2017
Created by: kewakl
You could... write time/date to (retentive) registers at whatever interval you require, then on first scan copy those registers elsewhere. They will hold the last UPDATE written before power loss.
caveat: a stop/run cycle will be indicated the same way
Created Date: October 11,2017
Created by: tpeery
Thanks for the resolution to this problem! I had not yet used the clock/calendar functions in the Click and as such was unfamiliar with it. So I checked out the forum and it all became clear! I am up and running now and when I lose power I will know when it happened. The stop/run cycle will not be an issue for me. Thanks again for the quick response!
Created Date: October 12,2017
Created by: OkiePC
Sidenote:
These two items can keep your Click up and running for days without power:
http://www.pulspower.com/products/show/product/detail/ub10241/
https://www.atbatt.com/csb-battery-12v-40ah-deep-cycle-sla-battery.asp?gclid=EAIaIQobChMI7qKXwKHs1gIVhGl-Ch0zLQ1_EAQYBCABEgJB1PD_BwE
Created Date: October 13,2017
Created by: kewakl
Paul, thank you for that!
We have just begun looking into small UPS offerings to power CLICK configurations.
This is the first item that we looked at.
https://www.phoenixcontact.com/online/portal/us?uri=pxc-oc-itemdetail:pid=2866611
https://www.phoenixcontact.com/online/portal/us?uri=pxc-oc-itemdetail:pid=2866417