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Time greather than tags differential value

Question asked by costinpetromi on Feb 26, 2020
Latest reply on Feb 26, 2020 by sraposo

I have one tag for ambient temperature and the tags for my devices functional temperature. Based on that I want to calculate daily running uptime (percent) for my devices using TimeGT function (as when the machines running temperature is higher than ambient temperature with minimum 2 units). 

Ex: TimeGT(/Machine temperature tag'-'ambient temperature tag','-1d','*', 2)/86400*100

The expression above didn't work as is not meant to work for tags differential values

I know that I can generate the differential artificial tags but maybe it is one another way to calculate ( avoid generating large number of artificial tags)