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Formula to monitor tank level, determine 12 hour avg usage and account when level increases

Question asked by GDKennedy on Aug 28, 2020

I have been trying different formulas to track a tank level and determine what the 12 hour average usage of material is.  The complication is that during a 12 hour period the plant will have to add to this tank to prevent the tank from going empty.  

I am having trouble writing a formula in PIAF that will track the level and determine when that level increases so I can include that amount of increase in my formula.  


I am doing this in PI AF so I would expect to be easier than doing it in a performance equation but I just can't figure out a good way to do it.


Here is a screenshot of the formula I am using,  I repeat this 12 times then sum the values at the end.


Any input is appreciated.

Thank you,