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the set points if the set point units are degrees, otherwise, they
will be ignored.
The System Pilot's internal limits will not affect the display.
The System Pilot reads the set points from the device and
displays them as read, even if they are outside the configured
System Pilot limits.
Pressing SELECT while a set point is blinking sends the
new set point to the controller. Before sending the new set point
to the device, the System Pilot will clamp the set point to its
own internal limits and will display the clamped set point on
the screen. If clamping a set point results in a value that is out-
side the limits read from the device, the System Pilot will dis-
play an error indication (“LIMIT”) and will not write the set
point to the device.
Pressing EXIT while a set point is blinking will cause the
System Pilot to revert to the original set point. Changing the set
point without pressing SELECT or EXIT for 15 seconds will
also cause the System Pilot to write the new set point to the
controller.
The System Pilot will not write set points to the controller
unless they have been changed from their original values.
Occupancy Override — To initiate an override from
the Zone Controller Default Screen (if the Zone Controller’s
occupancy status is UNOC), press the SELECT button for
less than 3 seconds. The occupancy status will begin to blink.
While the occupancy status is blinking, use the INC/DEC
buttons or the MODIFY rotary knob to adjust the occupancy
status. If the occupancy status is changed to OCC and then
SELECT is pressed, the System Pilot sends the occupancy
override to the Zone Controller.
If the occupancy status has been changed and the user does
not press SELECT or EXIT within 15 seconds, the System Pilot
will send the occupancy override to the controller and the occu-
pancy status will stop blinking. If the occupancy status has not
been changed, the System Pilot will not send occupancy status.
If the user presses EXIT while the occupancy status is
blinking, the System Pilot will revert to the UNOC status. The
System Pilot will not change the Zone Controller's occupancy
status.
If communication to the Zone Controller fails, the System
Pilot will display “COMFAIL” on the bottom line for 5 seconds.
NOTE: An occupancy override from the System Pilot will be
summed into the Tenant Billing Option’s accumulation of
override times. The occupancy override function is not avail-
able if the System Pilot is set to security level 4.
Alternate Maintenance Table — To display the Sys-
tem Pilot Alternate Maintenance Table (ALT_DISP), press the
SELECT button for at least 3 seconds from the Zone Controller
Default Screen. The System Pilot will display the Linkage
Controller or zone controller Alternate Maintenance Table
shown in Fig. 12, depending on whether or not the attached
Zone Controller has been designated as a Linkage Coordinator
(in the Zone Controller’s Linkage Configuration [LINKAGE]
Table).
If the Zone Controller is not a Linkage Coordinator, the
ALT_DISP table will simply display the zone controller’s
Points Display Table (POINTS) values. If the Zone Controller
is a Linkage Coordinator, the ALT_DISP table will display the
zone controller’s Points Display Table values followed by the
Master Zone Maintenance Table (MZNMAINT) values.
NOTE: The user will not be able to force any values from this
table regardless of whether the same point is forcible from any
other table.
Use the SCROLL UP/DOWN, NAVIGATE, or PAGE UP/
PAGE DOWN buttons to scroll through the table. Pressing the
EXIT button causes the System Pilot to return to the Zone
Controller Default screen.
Bus Scan — If the PAGE UP and PAGE DOWN buttons
are pressed at the same time for 3 seconds and if the attached
device is a Linkage Coordinator, then the System Pilot will
display the Bus Scan screen. See Fig. 13.
NOTE: If the attached device is not a Linkage Coordinator, the
System Pilot will ignore this button combination.
Approximately every sixty seconds, the Linkage Coordinator
attempts to communicate with its associated Zone Controllers,
optional Bypass Controller, and optional Air Source. The status
of this communication attempt is shown in the Bus Scan screen.
The top line shows the title “3V Bus Scan: NNN,” where
NNN is the bus number of the attached device. The next line is
the data header, which is shaded gray. The rest of the screen
shows the following data from the scanned devices: device
address (Addr), device type (DevType), alarm flag (Alm) and
status (Stat).
The alarm flag will be Yes if there are outstanding alarms in
the device’s alarm history table and No otherwise. The status
column will display Zone Controller’s space temperature, By-
pass Controller’s duct temperature, or “Fail” if the Linkage Co-
ordinator is unable to communicate with the device. The alarm
flag and status will be dashes (“----“) for non-3V devices. Tem-
peratures will be displayed with one decimal place. Values of
–40.0 and 245.0 F will be displayed for open and shorted
sensors.
Use the SCROLL UP/DOWN, NAVIGATE or PAGE UP/
PAGE DOWN buttons to scroll through the list of devices.
Fig. 12 — System Pilot Alternate
Maintenance Tables