FEC920: USER GUIDE
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September 18
5.4.1 Vertical Trend
Mode
In this mode, channel values are traced as though on a chart rolling downwards (i.e with the latest data at the
top). The chart speed, and the number of major divisions are configured in the ‘Group.Trend’ area of
configuration (Section 6.3.1). By default, the chart background is black, but this can be changed to white or gray
in the ‘Instrument’ ‘Display’ area of configuration (Section 6.1.3).
Figure 17 Vertical trend mode display elements
One of the channels is said to be the ‘current’ or ‘scale’ channel. This channel is identified by its pen icon being
displayed, and by the channel descriptor, dynamic value and its scale being displayed on a ‘faceplate’ across
the width of the display, above the chart.
Each channel in the Group becomes the ‘current’ channel in turn, for approximately five seconds -i.e. the
channels are cycled through, starting with the lowest numbered channel. Once the final channel in the Group
has been displayed for five seconds, the first channel is returned-to and the process repeats. This scrolling
behavior can be enabled/disabled from the top level menu ‘Faceplate Cycling (Off)’ item described in Section
5.3.5.
The scroll button can be used to cycle through the channels manually in both Faceplate cycle on and off modes.
Use of the up arrow button causes the next enabled display mode to be entered (default = horizontal trend).
The page key calls the top level menu.
12:01:08
Channel 1
6.23
V
Inst name
Alarm Threshold
Current point name
Current point scale
Current trace ‘pen’
Faceplate
Current point value
Time/date stamp
Current time/date
Recording symbol
Status icons
Instrument name
A5E45696052A Rev-AA
