iWorx® SMZ1
20
505-048-2, Effective: March 10, 2015
© 2015 Taco Electronic Solutions, Inc.
CONTROLLER IDENTIFICATION
Once the SMZ1 is properly installed and recognized by the LCI, the LCI touchscreen is used to configure the settings of
the controller and to monitor the Inputs, Outputs and Alarms. This section describes the commands available on the
LCI for monitoring/configuration of the SMZ1, and the meanings and suggested values for controller parameters. For
more information on using the LCI, see the
iWorX LCI User’s Guide.
Network Inputs
The SMZ1 allows a network manager to write to Network Input Variables for the purpose of overriding the configuration,
operation and outputs of the SMZ1. The variables are listed below and in Table
Values written to NVIs have absolute priority over any other controller operation.
•
nviOccCmd
overrides the occupancy as obtained from the thermostat. Writing to this variable will also be reflected
in the controller’s output of the occupancy mode. Note that this is NOT the occupancy sensor. The occupancy sen-
sor hardware input (OCC) will still be 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 sent is 1, then the runtimes are reset.
•
nviSysTime
is a time stamp to set the date and time. Writing to this variable will change the time on the device and
will affect all time-related functions such as schedules.
Table 1: Network Variable Inputs (NVIs)
Inputs
This screen list all the inputs on the SMZ1. These values cannot be changed.
Internal Variable
Name
Format
Range
Description
nviOccCmd
SNVT_occupancy
0=Occupied
1=Unoccupied
2=Bypass
3=Standby
-1=Nul
Occupancy Command
NOT APPLICABLE
nviResetRuntime
SNVT_lev_disc
0=no reset
1=reset runtimes
Resets fan, heating, and
cooling runtimes
nviSysTime
SNVT_time_stamp
Date/Time
System time
Setting
Range
Description
Outside Temp
-29 to 230
°F (-33 to 110
°C)
OAT as reported from the ASM2 controller on the net-
work
Snow Melt Sensor 1
Off,
On
Status of the snow melt sensor
Snow Melt Sensor 2
Snow Melt Sensor 3
Snow Melt Sensor 4
Slab 1 Temp
-60 to 230
°F (-51 to 110
°C)
Measured temperature of each slab zone.
-60
°F relates to an open sensor
230°F relates to a shorted sensor
Slab 2 Temp
Slab 3 Temp
Slab 4 Temp
