Rockwell-automation FactoryTalk Historian SE DataLink 4.2 User Guide Manual de usuario Pagina 103

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8 Supplementary Information
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.
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