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IM WT1801-01EN
Display Format (FORM)
Number of Trend Display Windows (Format)
You can choose the number of windows from one of the following options:
• Single: No windows
• Dual: Two windows
• Triad: Three windows
• Quad: Four windows
Depending on the number of windows, the number of displayed points in each window changes as described
below.
Single: 672 points, Dual: 336 points, Triad: 224 points, Quad: 168 points
When the screen is split, the number of displayed points along the vertical axis of a single window is halved.
Methods for Assigning Waveforms to Screens
Trends whose displays are turned on are assigned in numeric order (T1 to T16) to the split screens. The
assignment method corresponds to the
option in the waveform display.
Time Axis (Time/div)
The time axis is set in Time/div (time per grid division). The time per division can be set in the range of 3 s to 1
day.
The trend data update interval is determined by the data update interval and the time axis (Time/div). For
example, if the data update interval is 50 ms and you set Time/div to 3 s/div, the trend display is updated every 1 s.
If you set the data update interval to 10 s and Time/div to 3 s/div, the trend display is updated every 10 s, and the
trend data is displayed as a line graph, with each point separated by 10 s. If you set Time/div to 1 day/div, the
trend display will be updated once every 1080 s regardless of the data update interval.
One division (1 div) on the trend display is equivalent to 80 rasters. For example, if you set Time/div to
1 day/div, one raster is 1080 s (which is equal to 1 day/80), the trend data update interval is 1080 s, and
the displayed data is P-P compressed. For information about rasters and P-P compression, see “p-p
Compression.”
Restarting Trends (Clear Trend Exec)
When you restart trends, the trend display up to that point is cleared, and the trends start over from the right end
of the screen.
In addition to when you execute Clear Trend Exec, trends will also restart when:
• You change a trend display function, element, or harmonic (option) setting.
• You change the trend time axis (horizontal axis) setting.
Advanced Trend Display Settings (Display Settings)
These are the same as the advanced waveform display settings.
All advanced trend display settings are shared with the advanced waveform display settings. If you change
the advanced settings in the trend display, the advanced settings in the waveform display also change. For
example, if you set the display of the scale values to OFF in the trend display, the display of the scale values
will also be set to OFF in the waveform display.
11 Trend Display
