Rockwell Automation FactoryTalk Historian SE DataLink 4.2 User Guide - Manual (Page 44)

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FactoryTalk Historian DataLink User Guide
36
The resulting function array appears as:
Compressed Data
Returns either all values of a FactoryTalk Historian point occurring within
a specified time range, or a number of point values beginning at a certain
time.
Compressed values are data recorded by the FactoryTalk Historian server
after a compression algorithm has removed all values that represent the
same slope.
Separate dialog boxes are provided for Compressed Data (Start Time/End
Time) and Compressed Data (Start Time/Number) in FactoryTalk Historian
DataLink for Excel XP-2003. For 2007, you can select a Time Range or Number of
Values calculation in the task pane.
Required
Arguments Tagname
Start Time
End Time or Number of Values, depending on the function type