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17.0 ECT MODBUS Networking to E2s
Figure 17.1 - Location of E2 COm Parts
(E2 Versions 3.xx and below)
Connecting an XEV controller to an E2 requires the E2 to be
version 2.84 or above. Contact Retail Solutions for upgrade
information if the controller is a version before 2.84.
An E2 has up to three COM ports that can be assigned for
MODBUS communication: COM2, an RS485 port on the
E2 power interface board, and COM4 and COM6, which
are optional ports requiring expansion cards. COM4 is
recommended for MODBUS connection of Emerson units.
COM ports can only be used for one function; in
other words, if COM2 is set up as the I/O network, you
cannot connect MODBUS devices to COM2. Ensure your E2
is equipped with an RS485 COM Card (P/N 637-4890) and
configured in E2 General Services
(
Serial tab) to enable COM4 or an
E2 Expansion COM Card (P/N 637-4871) to enable COM6.
Connect the MODBUS network cable to the three terminal
connector on the COM port you wish to assign as MODBUS.
Reverse polarity of +/- on RS485 cable from E2 to the
device.
Figure 17.2 - MODBUS Networking
17.1 E2 Setup of Devices
17.1.1 Set Up Network Ports
Before setting up device, the port on the E2 that
has the MODBUS cable connected must be set up as a
MODBUS port.
1.
Log in to the E2 with Level 4 access.
2.
Press
Info
3.
Press
Controller Info setup screens:
Figure 17.3 - Serial Communications Manager Screen
4. This screen will have a "Connection" field for all
COM ports on the E2. Highlight the COM port
connection field that will be used for the
device, and press
of network types, select MODBUS.
5. Four fields will become visible underneath the
COM port connection field, which pertain to the
way the device communicates:
6. Press
17.1.2 Add and Connect the Device
To enable communications between E2 and the units, the
devices must be added and addressed in E2.
1. Log in to the E2 with Level 4 access.
2. Press
and Controllers.
Figure 17.4 - Num Network Ctrls NetSetup Screen
www.emersonclimate.com/flowcontrols
followed by
to open the Serial tab of the General
LOOK UP. From the list
• Baud - Default setting is 19.2k. The baud rate
setting should be set to match the baud rate of
the device(9600). (All devices connected 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)
• Stop Bits - Leave this field at the default value (1).
to save changes and exit.
- Connected I/O Boards
General Controller
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