Rockwell-automation FactoryTalk Historian SE DataLink 4.2 User Guide Manuale Utente Scaricare il pdf (Pagina 44)

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FactoryTalk Historian DataLink User Guide

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

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Rockwell-automation FactoryTalk Historian SE DataLink 4.2 User Guide Manuale Utente Pagina 44