Johnson Controls YORK YK MaxE, Operation Manual

Page: 136 / 184

JOHNSON CONTROLS
136
FORM 160.54-O1
treNd setUp sCreeN
oVerVieW
This screen is used to configure the trending screen.
The parameters to be trended are selected from the
Common Slots Screen or Common Slots Master list
and entered as Slot Numbers for Data Points 1 through
6. The Y-Axis minimum and maximum values for each
parameter are entered as Data Point Min and Data Point
Max for Data Points 1 through 6. The interval at which
all the parameters are sampled is selected as the Data
Collection Interval.
dispLaY oNLY
None
prograMMaBLe
Chart Type
Access Level Required:
OPERATOR
Selects CONTINUOUS, ONE SCREEN or TRIGGERED
(If compressor application is other than “P”, applies only
to Flash Memory Card version (C.MLM.01.05.xxx and
later) type of graph.
Collection Interval
Access Level Required: OPERATOR
Selects the interval at which the parameters are sampled.
There are 450 data points displayed across the X-Axis
of the graph. Each point represents the instantaneous
value of the parameter. The user selects the time interval
between these points. This is called the DATA COL-
LECTION INTERVAL, or the interval at which the
parameter is sampled. This interval is programmable
over the range of 1 second to 3600 seconds (1 hour), in
one second increments. The selected interval not only
determines the sample interval, but also the full screen
time display. The full screen time display is a result of the
selected interval in seconds, multiplied by the 450 data
points. For example, if the Data Collection Interval is
programmed for 900 seconds, the parameter would be
sampled every 900 seconds, with the last 112.5 hours
(4.7 days) of data viewable on the screen. Therefore, the
selected interval is a compromise between resolution
and full screen time display. Select the desired Data
Collection Interval
as follows:
1. Determine the desired time interval (in seconds),
between data samples.
2. Calculate the full screen time display as follows:
•
450 x Data Collection Interval = full screen seconds
•
full screen seconds / 60 = full screen minutes
•
full screen minutes / 60 = full screen hours
•
full screen hours / 24 = full screen days
3. Decide if the resultant sample interval and full screen
display meet the requirements. If not, select a dif-
ferent sample interval.
00473VIP
fig. 41
optiView Control Center