Rockwell Automation 9301 Series RSView32 Users Guide - Manual (Page 498)

Configuring trends
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13–27
Comparing real-time and historical data
You can layer trends, which is useful for comparing real-time and
historical data in order to see process changes.
To layer trends:
1. Create two or more trends of the same size.
2. Configure the trends.
3. Select the trend that will be on top. On the Attributes menu, click
Hollow.
4. Move the trend that will be on top over the other trend.
5. With the trend still selected, click Bring to Front on the Arrange
menu.
Creating control for a trend
To control a trend, operators require buttons and other graphic
objects that are associated with the trend’s control tags. You can draw
your own buttons and objects for controlling a trend, or you can use
the objects in the Trends library. For details, see “Using the Trends
graphic library” on page 13-35.
Control tags are a type of memory tag—that is, they are tags that are
created and updated by RSView32. You can use these tags to control
the view of the trend at runtime—for example, you can scroll and
zoom in on the trend.