York YZ MODEL A, Руководство по эксплуатации и обслуживанию

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JOHNSON CONTROLS
80
FORM 161.01-OM1
ISSUE DATE: 6/8/2018
SECTION 3 - OPTIVIEW™ CONTROL CENTER FUNCTIONS AND NAVIGATION
FIGURE 34 -
TREND SCREEN
LD26755
As many as six Operator selected parameters (data
points) 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 maximum value for each parameter. Analog pa-
rameters 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 la-
bel is displayed at a time. The Y-axis Toggle Key is
used to toggle the Y-axis labels through the different
parameters. The Y-axis label that is being displayed is
identified at the top of the graph. For identification,
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 parameter
is less than the Y-axis label minimum for that param-
eter, 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, and 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 inter-
val. If triggered is selected, data collection can be set
to start or stop based upon the selected trigger action
(START or STOP). If START is selected, data collec-
tion will not begin until the Triggers have been satis-
fied and any selected trigger delay has elapsed. Data
collection will stop at the completion of one screen of
data similar to 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.