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Is TagAvg in PI Analysis able to calculate an hourly average once per hour instead of a moving average?

Question asked by DavidMFairchild on May 29, 2020

I have the Expression setup as TagAvg('PITag', '*-1h', '*') with the scheduling setup as Periodic at 01h 00m 00s.

 

If I send the result to an attribute and trend the attribute I get a moving hourly average. But if I send it to a PI Tag I get a static hourly average as expected.  Why does it change to a moving average when you attempt to write the values to an attribute?  I am looking for a replacement for the PI Processbook Dataset trend which doesn't accept ERD input.

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