I'm passing through the problem below.
I have an AF element with the attributes:
Flow: Flowtag (it’s a PI Point);
MaxProj: 50 (the maximum value the flow could reach, set manually);
MaxHist: obtained using the flow tag with value retrieval method to get the max value that the flow tag has reached in its history. (TimeMethod=TimeRange;RelativeTime=-5y;TimeRangeMethod=Maximum)
So, Im trying to do a visual alarm in ProcessBook, using multistate symbol, based on some calculations, using those AF attributes.
I would like to use something like:
IF Flow.tag > = MaxHist and < MaxProj then “multistate symbol get yellow”
Else if Flow.tag >= MaxProj then “multistate symbol get red”
Else “multistate symbol get green”
But Im not finding a way to implement that logic in a symbol. How should I do that?