We are dealing with future data in a certain project we are working on. So in order to save the future data in PI, we are back dataing it and saving it to PI.

The issue, we are having is performing calculations on this data.

My understanding is that we can not use PE on historic data. Any suggestions?

Is it something that we can achive by using PI ACE or PI event frames. I am not familiar with either of the technologies.

Thanks for your help.

By historical data are you performing an actual vs predicted type of calculation? PE has a PrevEvent function that can access historical data...really depends on the type of calculations, and volume of calculations you need to perform when considering PE, ACE, ...

For example, let us assume you stored future data with a 1 day offset to a corresponding PI Point. Your comparison PE could be something like:

if 'ActualTag' = PrevEvent('PredictedTag','*-1d') then "WeGotItRight" else "WeGuessedWrong"

Check out PIPC\Help\PEReference.chm help file for all the functions available.