TagMin (Tag-based PE function)

Find the minimum value of a point during a given time, according to values stored in the PI Archive.

Syntax

TagMin(tagname, starttime, endtime [, pctgood])

Arguments

tagname

A tagname. This point should represent a continuous variable.

starttime

Beginning of the time range to search. Relative times are relative to endtime, if endtime is not itself a relative time.

endtime

Relative times are relative to starttime, if starttime is not itself a relative time. This time must be after starttime.

pctgood

Optional. Minimum time percentage over the given time range, that the point's archived values must good.

Returns

The point's minimum value during the given time.

Exceptions

If the point has no good values or the pctgood minimum is not reached for the given time range, returns an error value.

Notes

Note: The UnderRange digital state is not taken into account when calculating this value.

Example

TagMin('tag1', 'y', '*')

TagMin('tag1', '-1h', '*',90)

TagMin('tag1', '14-Dec-97', '+1h')