iWorx® HPU3
24
505-035, Effective: June 30, 2015
© 2015 Taco Electronic Solutions, Inc.
Note that Network Input Variables that directly affect controller outputs are ignored when commissioning is enabled.
Outputs set in the Commissioning screen when it's enabled have absolute precedence.
•
nviSpaceTemp
overrides the space temperature as obtained from the thermostat, sensor or ASM controller and is
used by the controller for temperature control. Values written to this variable will appear in the controller's output of
the space temperature on the LCI.
•
nviSpaceRh
overrides the space humidity as obtained from the thremostat, sensor or ASM controller and is used
by the controller for humidity control. Values written to this variable will appear in the controller's output of the
space humidity on the LCI.
•
nviSupplyTemp
overrides the supply temperature as obtained from sensor input and is used by the controller for
supply air temperature control. Values written to this variable will appear in the controller's output of the supply air
temperature on the LCI.
•
nviSupplyRh
overrides the supply humidity as obtained from sensor input and is used by the controller humidifica-
tion to insure that the supply humidity does not go beyond the Supply RH Limit.
•
nviSetpoint
overrides the setpoint as obtained from the thremostat (SLink or BZU), LCI or a pre-configured backup
schedule.
•
nviOccCmd
overrides the occupancy as obtained from the thermostat or LCI schedule.Values written to this cari-
able are reflected in the controller's output of the Occupancy mode. Note that this does NOT override the occu-
pancy sensor; the occupancy sensor (OCC) is displayed on the LCI based on its configuration.
•
nviResetRuntime
is a command to reset the fan, heating and cooling runtimes. If the value sent is 0, then no reset
occurs; if the value is 1 then the runtimes are reset.
•
nviSysTime
is a time stamp to set the date and time. Writing to this variable changes the time on the controller and
affects all time-related functions.
•
nviUnitEnable
overrides the global unit enable signal. Unless the unit enable signal is ST_ON (4), the compressor
stages are not allowed to energize.
•
nviOutOverride
is a structure that overrides the hardware digital and analog outputs of the HPU3. These values
allow the network controller to directly control the analog and digital outputs of the controller. These values have
priority over other normal output control except for commissioning mode; commissioning mode has absolute prior-
ity over outputs on the controller.
Note: The HPU3 makes no attempt to interpret the outputs; assigning meaningless outputs may have unpredictable
results.
