Honeywell EN2Z-0906GE51 R0708 - Manual (Page 119)

USER GUIDE ARENA/ RANGER
119 EN2Z-0906GE51 R0708
TRENDING AND TRENDS
Definition Trending means to record value changes of selected datapoints and show the
developing of the values for a definable time interval in a chart or table.
Fig. 23. Trend Example
Trend Types ARENA allows 2 ways of trending:
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
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.
NOTE: Historical trend is possible on all levels (station, site, controller, etc.) and in
connected and disconnected states of ARENA.
Live Trend
The trend values come live from the controller of the selected site.