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USER GUIDE
Trending means to record value changes of selected datapoints and show the
Definition
developing of the values for a definable time interval in a chart or table.
ARENA allows 2 ways of trending:
Trend Types
Historical Trend
The trended datapoint values are retrieved from the ARENA database which can
contain values of all levels (station, site, and controller). In the first step, the
datapoint values are recorded. In the second step, the trended datapoints are
displayed for a definable time interval with a fixed start and end time.
Examples: Time interval = Last 3 Days
NOTE: Historical trend is possible on all levels (station, site, controller, etc.) and in
Live Trend
The trend values come live from the controller of the selected site.
Fig. 23. Trend Example
Trend data is saved and displayed for the last 3 days after
starting the trend.
Time interval = From 04.04.2007, 12.00 through 04.05.2007,
12.00.
Trend data is saved and displayed for the time range
04.04.2007, 12.00 through 04.05.2007, 12.00.
connected and disconnected states of ARENA.
119
ARENA/ RANGER
TRENDING AND TRENDS
EN2Z-0906GE51 R0708
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