11
JOHNSON CONTROLS
FORM 160.80-EG1 (808)
Display Only:
• History printout
Programmable:
• page Up
• page Down
• print History
Also under the
HISTORY
screen is the
TRENDING
screen, accessible by the key marked the same. On this
screen, up to six operator-selected parameters, selected
from a list of over 140, can be plotted in an X/Y graph
format. The graph can be customized to record points
once every second up to once every hour. There are
two types of charts that can be created: single screen,
or continuous screen. The single screen collects data for
one screen width (450 data points across the X-axis), then
stops. The continuous screen keeps collecting the data,
but the oldest data drops off the graph from left to right
at the next data collection interval. For ease of identifica
-
tion, each plotted parameter, title and associated Y-axis
labeling is color coordinated.
Display Only:
• This screen allows the user to view the graphical
trending of the selected parameters and is a gateway
to the graph setup screens.
Programmable:
• Start
• Stop
• Y-axis
• X-axis
The
TREND SETUP
screen is used to configure the trend
-
ing screen. The parameters to be trended are selected
from the Trend Common Slots screen, accessed from
the Slot Numbers button or the Master Slot Numbers
List found in the Operating Manual. The interval at which
all the parameters are sampled is selected under the
Collection Interval button. The data point minimum and
maximum values may be adjusted closer to increase
viewing resolution.
Programmable:
• Chart Type (select
continuous
or
one screen
)
• Collection Interval
• Select
• Data point Slot Number (1 - 6)
• Data point Min (1 - 6)
• Data point Max (1 - 6)
The
TREND COMMON SLOTS
screen displays the Mas-
ter Slot Numbers List of the monitored parameters.
Display Only:
• Slot Numbers
Programmable:
• page Up
• page Down
• print
DISPLAY MESSAGES
The Control Center continuously monitors the operating
system, displaying and recording the cause of any shut-
downs (Safety, Cycling or Normal). The condition of the
chiller is displayed at the System Status line that contains
a message describing the operating state of the chiller;
whether it is stopped, running, starting or shutting down.
A System Details Line displays warning, Cycling, Safety,
Start Inhibit and other messages that provide further
details of the Status Bar messages. Messages are color-
coded: Green – Normal Operations; Yellow – warnings;
Orange – Cycling Shutdowns; and Red – Safety Shut-
downs to aid in identifying problems quickly.
Status messages include:
• System Ready To Start
• Cycling Shutdown – Auto Restart
• Safety Shutdown – Manual Restart
• Start Sequence Initiated
• System Run (with countdown timers)
• Start Inhibit
• Slide Valve Closing Before Shutdown
• System Lockout Delay
Run Messages include:
• Leaving Chilled Liquid Control
• Motor pulldown Limit
• Motor – High Current Limit
Start Inhibit Messages include:
• Anti-Recycle XX min/sec.
• Slide Valve – position >30%
• Motor Current >15% FLA
• LCSSS – High-Temperature phase X - Stopped
