Nj Controls

Micrologix 100 RTC disable?

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The RTC on my micrologix 1100 is randomly getting disabled. I'm not writing to the RTC any place in the ladder logic. The only reference to it at all is one rung that used a compare with  the .hr value.

The manual says this is a 'read only' bit. The battery bit is never set. When I pull it up in RxLogix500 and click on the 'Set date and time' button(function file) the disable bit goes back to zero and it starts back up. Is there any chance this could be battery related even though the battery bit is not set?




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you can write value on your RTC by using CPW with one shot command. been using it for my production logging and it work perfectly 

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