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How to use a predefined PI calc expression in PI-PB

Question asked by Israa on Sep 28, 2019
Latest reply on Oct 2, 2019 by Israa

Hello all,


I have saved multiple PI calculation expressions in PI process book, each expression adds two or more PI tags and now I need to use these expressions to calculate the difference between some of them. For example if I added PI tage1 + PI tag 2 in one expression and PI tage 3 and PI tag 4 in another expression how can I get the difference between expression 1 and 2? Is there a way I can recall those expressions and use them in a new PI calc to calculate their difference? 


Thanks in advance!