Viewing Trend Data - ABB 800xA Operation

Section 3 CCF Displays

Viewing Trend Data

The source of the values that appear on Loop Detail Display trends are gathered
from real-time CCF trend data. Other trend view objects, as described in System
800xA Operations (3BSE036904*), can show real-time and historical trend data for
several tags at once.
The CCF trend data is scaled, based on the engineering unit range of the tag. When
the CCF trend data is available, and the visibility is enabled, CCF trend data is
displayed. Real-time trend values are not stored and only exist when the trend is
displayed.
Working with Loop Detail Display Trend Data
You can change the visibility of trend traces, adjust the refresh rate of the X-axis, the
range on the Y-axis and use a ruler to see the numerical values of points on the trend
graph.
Changing the Trend Refresh Rate
To change trend refresh rate, select the Refresh button and enter a value in seconds
(1 to 120). A total of 600 samples is shown on a full trend.
Changing the Trend Visibility
To change trace visibility, select the box next to a trace (see figure above). A
checked box becomes a visible trace. Unchecked, a trace is not displayed (data
continues to collect).
Changing the Y-Axis
To modify the Y-Axis, select either side of the trend area on the Y-axis markers.
This displays the Modify Y-Axis dialog. To change the top number on the Y-axis,
3BUR002418-600 A
Viewing Trend Data
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