Operating Basics
Trend Graph Updates
Trend graph displays are updated as follows:
The error range indicators are updated with every update cycle of the
trend graphs.
The update rate of the trend graphs depends on the time scale that is
selected:
When “Previous minute” or “Previous ten minutes” is selected, graphs
are updated every 5 seconds.
When “Previous hour” is selected, graphs are updated every 12
seconds.
When “Previous day” is selected, graphs are updated every 5 minutes.
When “Previous week” is selected, graphs are updated every hour.
NOTE.
When “Previous day” or “Previous week” is selected as the time
scale for a graph, changes that are made to the active alarm threshold are
not immediately re
fl
ected on the error range band of the graph. You can
force the graph to update by closing and reopening either the graph or the
application itself.
Error Range Indicators
The error-range indicators on the graph displays correspond (See Figure 39
on page 66.) to the active alarm thresholds set in the Alarm Con
fi
guration
dialog. (See page 63,
For trend graphs, the error range indicators behave as follows:
The error range indicators show the same value as the corresponding
Active alarm threshold value for that metric.
The presence of the upper and lower error bands depends on the presence
of the upper and lower alarms for that metric. If a metric has only an upper
limit, only the upper error-range band will be displayed. An error-range
band will not be shown for metrics that do not have either an upper or
lower value alarm.
The error range indicators on the graphs are updated at every update cycle
of the trend graphs.
Plot Lines
Most of the graphs have a Settings button in the top right corner which allows
you to add or remove plot lines on the graph. You can select the following plot
lines to display. By default, all plot lines are shown.
Draw maximum. Draws a plot line for the maximum measurement.
Draw average. Draws a plot line for the average measurement.
Draw minimum. Draws a plot line for the minimum measurement.
RFM220 User Manual
69
Summary of Contents for RFM220
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Page 26: ...Preface xvi RFM220 User Manual...
