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How to build a rate of change PICalc tag?

Question asked by hqcan on Apr 6, 2015
Latest reply on Apr 6, 2015 by dcho

I am trying to take a sum of a few live PI Tags that read out a tank volume (m3), and then build a PI Calc that reads out the present value minus the previous hour value in order to give me a rate of change (i.e. m3/hr). Does anyone know how I could build a new PICalc tag to do this in PI Processbook? 


Thanks for any and all help!