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How can I compare values of a tag in different times without using PI DataLink?

Question asked by rodrpensil on Jul 11, 2017
Latest reply on Jul 12, 2017 by JánosPetró

Hi there,


I'm trying to do some calculation on the PI ProcessBook itself, like comparing values of a same tag in different times. I mean, for instance, if its currently value is greater than the value before I want to calculate this difference and show it on the screen, otherwise, nothing needs to bem done.


Can somebody tell me if it is possible to do such a thing in the ProcessBook without using DataLink nor other feature?