User Guide User guide

8 ● Supplementary Information
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95
Aggregate Functions
Name
Description
Avg
Average.
Max
Maximum.
Median
Median selector.
Min
Minimum.
PStDev
Population standard deviation.
SStDev
Sample standard deviation.
Total
Sum.
Miscellaneous Functions
Name
Description
BadVal
See if a value is bad (not a number or time).
Curve
Get value of a curve.
DigState
Get digital state from a string.
IsDST
Test whether a time is in local daylight savings time period.
IsSet
Test if a FactoryTalk Historian value is annotated, substituted, or questionable.
StateNo
The code number of a digital state.
TagBad
See if a point has an abnormal state.