5-32 • Site Supervisor Controller User Guide 2.0 026-1800 Rev 3 02-AUG-2016
5.14.2 Command
5.15 Emerson T-Stat
The Emerson T-Stat communicates with the Site
Supervisor controller using the MODBUS network. The
thermostat enables the controller to read status information
from the device as well as send operational setpoints to the
device. The device communicates using 8 data bits and 1
stop bit. For the full thermostat user manual, refer to P/N
026-1729.
This thermostat replaces thermostats for the following
types of system:
• Standard Heat & Cool Systems
• Two Stage Heat & Two Stage Cool Systems
• Air Source Heat Pump (with Aux. or Emergency
Heat)
• Ground Source Heat Pump (with Aux. or
Emergency Heat)
• Air or Ground Source Heat Pump (No Aux. or
Emergency Heat)
• Standard Heat Only Systems
• Standard Central Air Conditioning
• Gas or Oil Heat
• Electric Furnace
• All Systems Listed Above with Economizer
Control
5.15.1 General Control
• The Site Supervisor communicates with the device
via Modbus. The thermostat communicates using 8
data bits, and 1 stop bit. Baud rate and parity can be
changed on the device using dip switches.
• The Site Supervisor will just provide an interface to
the devices. The White Rodgers Thermostat
monitors all information.
5.15.2 Alarms
• Online/Offline - Standard Site Supervisor
communication alarms
• White Rodgers Thermostat defined alarm outputs
from the device.
5.15.3 Device Commissioning
• To add a White Rodgers Thermostat to the Site
Supervisor network, from the Site Supervisor:
•This is accomplished using Commissioning from
the Add & Remove Device screen.
• Addressing the thermostat:
•The address can be set by adjusting dip switches
on the device. Follow the instructions in the White
Rodgers Thermostat installation guide for more
details.
•If the addresses match and the serial port and
physical wiring are correct, the device should be
shown as online in the Network Status screen.
Command Description/Alarm Text
Keyboard LOCK The front panel is locked cannot be used.
Keyboard UN-LOCK The front panel is unlocked and can be
used.
Alarms Muting Silences the alarm output.
Defrost Periodic Sends the Disable Standalone Defrost
command.
Table 5-13 - XR75CX 2.6 Commands