TDC3000 EPLCG point alarm problem

C

Thread Starter

Chris

A DHP digital composite point won't alarm in. I change the states of the inputs and I can not get the alarm to ring in. The inputs change. The only way I can get it to ring is by changing the alarm priority to noaction and then back to high. Then it will ring in but gets stuck in the alarm condition even after point is back out of alarm condition.

Seems like it is not scanning but inputs switch automatically and so does point output. I tried other points on same box and they are same.

Then I tried another point in a different box on same highway and the point alarmed in (worked fine).

What seems really weird is it seems the analog in points on the box that gives me trouble is alarming in. Just the digital composite points on the box are the issue. They were built years ago and a few weeks ago they just stopped working

Any suggestions?
 
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