Specifications

11 – Configuring Group and Trend Displays
230 R400
Configuring Trend Set Displays
Trend set displays are standard Station displays that provide a way of viewing
historical data for points.
Trend set displays complement other types of displays that can be used to view
historical data such as point detail trends, group trends, and custom display
trends.
About Trend Set Displays
The number of trend sets available in your system depends on the server
database sizing. For details about database sizing, see the Installation Guide.
Trend Sets and Point History
Trend Set displays (and other types of Trend displays) show historical information
for points. In order to configure and use the Trend Set displays effectively, it
helps if you understand how PlantScape collects point history. Point history
collection is described in “History Collection and Archiving” on page 167.
When a point parameter has been configured for history collection, it is sampled
and stored in the server database history files. The Trend displays show the
history data contained in these files.
When configuring a Trend Set, you need to specify the required history interval to
be viewed. (History intervals are the periods between snapshots and period
averages used in collecting history.)
Trend Sets and Point History Archiving
The point history archive files are automatically searched to display history data
for a specified time and date on a Trend Set display.
For details on archiving point history, see “Configuring History Archiving” on
page 170.
Using Trend Set displays
The procedures for using a Trend Set display (zooming, scrolling, and getting a
value readout) are described in the Operators Guide.
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