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PI Datalink Calculated Data Filtering Problem

Question asked by SLethen on Oct 16, 2018
Latest reply on Oct 17, 2018 by Lal_Babu_Shaik

I have a PI tag that I want to calculate time-weighted daily averages over a 1 year period. The tag value should range between 0 and 3000, however the instantaneous data periodically returns values of -999999, which skews the calculated averages.

 

I've tried using the filter expression 'TagName' > 0 to remove the negative values, however it still returns negative calculated averages, albeit smaller in magnitude (e.g. for a specified time returns -400 instead of -40000).

 

Am I missing something in my filter expression?

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