I am trying to configure a AF analysis that will find the first time the tag starts to increase. For example I am looking at level transmitters and I need to report the date and time that the tag goes from a value typically less than 10 inches to state the tank is filling. So if filling of the tank began today at 11:03 AM that is the date and time I need to report.
I can get it to work somewhat now with this equation
If PrevVal('LT-9132.PV','*-300h') <= 10 and TagVal('LT-9132.PV','*')>=15 Then FindLE('LT-9132.PV','*-160h','*',10) Else NoOutput()
But unfortunately it is looking at a date previous to the low value. To clarify the low was reported on 2/4/2020 06:25 AM and the first time the transmitter reported a value greater than 15 it reported 2/4/2020 04:18 AM. I need it to look ahead the value should be 2/4/2020 09:26 AM