Honeywell W7750A 用户手册
EXCEL 10 W7750A,B,C CONSTANT VOLUME AHU CONTROLLER
74-2958—1
28
NOTE:
During all modes all digital and analog physical
inputs are periodically read, the diagnostic output
network variables can be polled, the input network
variables are received, and the output network
variables are sent periodically.
inputs are periodically read, the diagnostic output
network variables can be polled, the input network
variables are received, and the output network
variables are sent periodically.
UNOCCUPIED Controller occupancy mode was
overridden to Unoccupied mode
Network input (DestManOcc) containing a time-of-day schedule
override signal of UNOCCUPIED from the Excel 10 Zone Manager or
other L
override signal of UNOCCUPIED from the Excel 10 Zone Manager or
other L
ON
W
ORKS
Bus device.
BYPASS
Controller occupancy mode was
overridden to Bypass the current
Unoccupied mode
overridden to Bypass the current
Unoccupied mode
DI (Bypass) was pressed, and the Bypass duration timer has not yet
expired, or the network input DestManOcc has a value of BYPASS.
expired, or the network input DestManOcc has a value of BYPASS.
NOT
ASSIGNED
ASSIGNED
No Bypass action
No Override input received.
Operational Modes (User Address: StatusMode)
START-UP
AND WAIT
AND WAIT
On power-up, provides a staggered
start sequence to evenly apply the load
to the electrical system.
start sequence to evenly apply the load
to the electrical system.
This mode occurs on controller power-up, and after downloading to the
controller from the configuration tool. Temperature control loops are
disabled.
controller from the configuration tool. Temperature control loops are
disabled.
COOLING
The Excel 10 is controlling the Cooling
mode.
mode.
Space temperature has risen above the current cooling setpoint, or the
network input (DestHvacMode) is COOL.
network input (DestHvacMode) is COOL.
HEATING
The Excel 10 is controlling the Heating
mode.
mode.
Space temperature has fallen below the current heating setpoint, or the
network input (DestHvacMode) is HEAT.
network input (DestHvacMode) is HEAT.
EMERGENCY
HEAT
HEAT
Compressors are disabled and only
Auxiliary Heat stages are allowed to
operate.
Auxiliary Heat stages are allowed to
operate.
The network input (DestManHvacMode) is EMERG_HEAT.
OFF MODE
The heat/cool control is turned off
immediately. The node is not running its
normal temperature control.
immediately. The node is not running its
normal temperature control.
Network input (DestManMode) containing AHU operational mode
information from C-Bus has value of MORNING WARM-UP.
information from C-Bus has value of MORNING WARM-UP.
DISABLED
MODE
MODE
The heat/cool control and frost
protection are turned off immediately.
The node is not running its normal
temperature control.
protection are turned off immediately.
The node is not running its normal
temperature control.
–
SMOKE
EMERGENCY
EMERGENCY
The node has entered a smoke
emergency. The fan and dampers are
then set to the conditions configured by
SmkCtlMode. The control remains in
SMOKE_ EMERGENCY until power is
cycled or the node receives
DestEmergCmd set to
EMERG_NORMAL.
emergency. The fan and dampers are
then set to the conditions configured by
SmkCtlMode. The control remains in
SMOKE_ EMERGENCY until power is
cycled or the node receives
DestEmergCmd set to
EMERG_NORMAL.
Network input (DestEmergCmd) containing smoke control signal from
another L
another L
ON
W
ORKS
Bus device has value of SMOKE_EMERG.
FREEZE
PROTECT
PROTECT
The temperature control is set to HEAT
with the setpoint set to the frost limit
setpoint 46.4°F (8°C).
with the setpoint set to the frost limit
setpoint 46.4°F (8°C).
The Window digital input detects an open window.
MANUAL
POSITION
POSITION
The physical outputs are being
controlled manually. The temperature
control loop is turned off.
controlled manually. The temperature
control loop is turned off.
Typically this is done by the user through E-Vision or XBS by setting
the point DestManMode to MANUAL mode.
the point DestManMode to MANUAL mode.
FAN ONLY
Control algorithm is disabled, except
that the fan is turned on.
that the fan is turned on.
The space temperature sensor has failed, or the network input
(DestHvacMode) is FAN ONLY.
(DestHvacMode) is FAN ONLY.
DISABLED
Control algorithm is shut off.
Network input (DestManMode) containing AHU operational mode
information from an operator or the network that has a value of
DISABLED.
information from an operator or the network that has a value of
DISABLED.
Table 5. Modes Of Operation For The Excel 10 W7750 Controller (Continued).
Mode
Description
Events causing a controller to switch to this mode