User`s guide

Operating the DX LCD Display 4-13
The plot itself is shown as a continuous line of up to 61 points, where
each point represents one sample. If any sample falls outside of the
range, then that sample point will not be displayed and there will
appear to be a break in the plot. The range values can be adjusted,
however, to make all samples visible in the same graph. The procedure
for editing the range values is described later in this chapter. If
two consecutive samples do not belong to coherent time frames due to
a power failure, then this is indicated in that there is no connecting line
between them and there is a short line below the horizontal axis at that
position.
The display (or drawing) mode of the graph is shown in the middle of
the y-axis, and its value can be either Auto or Manual. This field can
be toggled between the two modes as described later in this chapter.
Auto mode causes the plot to be redrawn continuously when new
samples arrive from the DX controller. The graph appears to shift left
because old samples are discarded from the left and new samples are
added to the right. When the mode is set to Manual, the plot is not
updated with new samples unless you reselect Manual or toggle the
mode from Auto to Manual, in which cases the entire plot is redrawn.
Digital Trend
If you selected a digital (logical) trend variable in the main Trend Data
screen, then the Trend Group screen for the variable appears, as shown
in Figure 4-6.
dxtk_37
GROUND FLOOR TREND 4 11:40
ALARM:
Total: 00
TREND GROUP: Lobby Lights
Reception Lights
Main Entrance 1
Main Entrance 2
4
Car Park 1
Car Park 2
Security 1
Security 2
Figure 4-6: Trend Group Screen