Set Up Network Ports
Network Setup and Commissioning • 23
8.3. Set Up Network Ports
Before communicating to the thermostat, the port
on the E2 that has the cable connected to the thermo-
stat must be configured to use the thermostat.
1. Log in to the E2 with Level 4 access.
2. Press
followed by
- General Con-
troller Info.
3. Press
+
to open the Serial tab of the General
Controller Info setup screens:
4. This screen will have a “Connection” field for all
COM ports on the E2. Highlight the COM port con-
nection field that will be used for MODBUS, and
press
- LOOK UP. From the list of network
types, select MODBUS (1-3).
5. Four fields will become visible underneath the
COM port connection field, which pertain to the
way the device communicates:
•
Baud -
Default setting is
19.2k
. The baud rate set-
ting should be set to match the baud rate dip switch
settings of all thermostat devices. (All devices con-
nected to the same COM port should be set to the
same baud rate.)
•
Data Size -
Leave this field at the default value (
8
).
•
Parity -
Leave this field at the default value (
None
).
The parity settings should be set to match the parity
dip switch settings of all thermostat devices.
•
Stop Bits -
Leave this field at the default value (
1
).
6. Press
to save changes and exit.
8.4. Adding a Thermostat
To enable communications between the E2 and the
thermostat units, the devices must be added and ad-
dressed in E2.
1. Log in to the E2 with Level 4 access.
2. Press
- Connected I/O Boards and
Controllers.
3. In the Connected I/O screen, under the ECT tab, En-
ter the number of devices in the WR T-Stat number
field.
4. Press
to return to the Network Setup menu,
then select
- Network Summary.
5. Locate the thermostat units you added to the net-
work list (press
and
to scroll through the
list). The default name for the Commercial Commu-
nicating Programmable Thermostat increments up
starting with WR T-Stat001. The two and three-let-
Figure 8-3
- Serial Communications Manager Screen
Figure 8-4
- Connected I/O Screen
