York YST Operation Manual page 123

FORM 160.67-O1
ISSUE DATE: 4/1/2015
A red screen with the words "TREND
MAX MUST BE > TREND MIN" will
appear if the Y-Axis minimum has been
programmed to a value that is greater
than the Y-Axis maximum for any param-
eter. If this appears, proceed to the Trend
Setup Screen to change the values.
prograMMable
Start
Access Level Required: OPERATOR
Pressing this key clears the graph, starts a new graph,
sets the time of day to the present clock time and be-
gins the trending. This key is only available if trending
is stopped. If the selected Chart Type is TRIGGERED
and TRIGGER ACTION is set to START, data collec-
tion will not begin until the Triggers have been satis-
fied and any selected TRIGGER DELAY has elapsed.
Otherwise, data collection will begin immediately.
Stop
Access Level Required: OPERATOR
Pressing this key stops the trending. The trend data is
frozen on the display until another graph is started with
the START key. The Stop key is only available if trend-
ing is running.
print
Access Level Required: VIEW
Allows the data on the trend screen to be printed in
tabular format. If set to EXISTING, a snapshot of the
data presently on the screen is sent to the printer. If set
to NEW, all data collected after pressing this key will
be sent to the printer as it is collected. If set to DIS-
ABLED, no data is sent to the printer. Refer to PRINT-
ERS section of this book for printout example.
JOHNSON CONTROLS
SECTION 2 - OPTIVIEW CONTROL CENTER INTRODUCTION
data Select
Access Level Required: VIEW
Allows the user to display all trended data points si-
multaneously or select a single trended data point for
display, hiding the other data points. Selections are
ALL DATA or DATA POINT X (1-6).
Y-axis
Access Level Required: VIEW
This key toggles the Y-Axis labels of the graph. Each
key press changes the label to another of the selected
parameters.
x-axis
Access Level Required: VIEW
This key toggles the X-Axis labels of the graph. Each
key press alternates the scaling between time of day
and elapsed time. The Time of Day scaling is in 24-
hour format. The Elapsed Time scaling is the time
elapsed since the START key was pressed, starting the
trending.
navigaTion
home
Access Level Required: VIEW
Causes a return to the Home Screen.
history
Access Level Required: VIEW
Causes a return to the History Screen.
Trend Setup
Access Level Required:
Only displayed if the trending is stopped. Causes a
jump to a sub-screen for configuring the trending dis-
play.
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