I am trying to create a calculation in PI AF, one of the things I did was create a variable (S12Zero) using FindLE to get a time stamp of the last time the tag value was below a desired value. I would like to use this variable (S12Zero) to get the value of the tag at that time stamp that is retrieved. When I reference the variable in the TAgVal equation I get an error that says the time cannot be converted to a valid AF time. Any suggestions on how to fix this error?
