FORM 160.81-O1 (1020)
ISSUE DATE 10/05/2020
73
JOHNSON CONTROLS
SECTION 2 - OPTIVIEW™ CONTROL CENTER
2
TRENDING SCREEN
FIGURE 30 - TRENDING SCREEN
Overview
As many as six operator selected parameters can be
plotted in an X/Y graph format. The X-Axis is scaled
per the selected Data Collection Interval and displayed
in a time of day or elapsed time format, as selected
with the X-AXIS toggle key. The Y-Axis is scaled for
each parameter per the selected minimum and maxi-
mum value for each parameter. Analog parameters are
scaled in pressure, temperature, volts, amps, hertz or
time. Digital ON/OFF parameters are scaled as zero
(OFF) and one (ON). Only one Y-Axis label is dis-
played at a time. The Y-AXIS toggle Key is used to
toggle the Y-Axis labels through the different param-
eters. The Y-Axis label that is being displayed is identi-
fied at the top of the graph. The DATA SELECT key is
used to display all trended Data Points simultaneously
or select a single Data Point for display. For identifi-
cation, each plotted parameter and associated Y-Axis
labeling is color coordinated.
The parameters are sampled at the selected Data Col-
lection Interval and plotted using 450 data points across
the X-Axis. If the actual value of the sampled param-
eter is less than the Y-Axis label minimum for that
parameter, the value will be plotted at the minimum
value. Similarly, if the actual value is greater than the
Y-Axis label maximum for that parameter, the value
will be plotted at the maximum value.
There are three types of charts that can be created:
• One Screen
• Continuous
• Triggered
When plotting reaches the end of the X-axis, if One
Screen is selected, trending stops and data is frozen. If
Continuous is selected, the oldest data is dropped from
the left-hand side of the graph at the next collection
interval. Thereafter, the oldest data is dropped from the
left hand-side of the graph at each data collection in-
terval. If Triggered is selected, data collection can be
set to start or stop based upon the selected Trigger Ac-
tion (Start or Stop). If Start is selected, data collection
will not begin until the Triggers have been satisfied and
any selected Trigger Delay has elapsed. Data collection
will stop at the completion of one screen of data as with
the One Screen. If Stop is selected, data collection will
not stop until the Triggers have been satisfied and any
selected Trigger Delay has elapsed.
If a power failure occurs while the trending is running,
the trending is stopped. Upon restoration of power,
the last screen of data that was collected will be dis-
played on the trending screen. The START key must be
pressed to initiate a new TREND screen.
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