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An E2 has three COM ports that can be assigned
for MODBUS communication (COM2). COM ports
can only be used for one function; in other words, if
COM2 is set up as the I/O network, you cannot con-
nect MODBUS devices to COM2. Ensure your E2 is
configured in E2 General Services (
Serial tab) to enable COM4 or COM6.
18.3. E2 Setup of Devices
18.3.1.Set Up Network Ports
Before setting up a 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
followed by
Controller Info.
3. Press
+
to open the Serial tab of the General
Controller Info setup screens:
Figure 18-4 - Serial Communications Manager Screen
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 the device, and
press
- LOOK UP. From the list 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:
• Baud - Default setting is 19.2k. The baud rate set-
ting should be set to match the baud rate of the de-
vice (9600). (All devices connected to the same
24 • XR35CX I&O Manual
,
- General
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).
6. Press
to save changes and exit.
18.3.2.Add and Connect the Device
To enable communications between E2 and the
XR35CX units, the devices must be added and ad-
dressed in E2.
1. Log in to the E2 with Level 4 access.
2. Press
and Controllers.
Figure 18-5 - Num Network Ctrls: NetSetup Screen
3. In the Num Network Ctrls: NetSetup screen, under
the ECT tab, enter the number of devices in the
Quantity field. (Max shows the maximum number
of devices allowed on the network.)
4. Press
to return to the Network Setup menu,
then select
- Network Summary.
5. Locate the units you added to the network list (press
and
to scroll through the list). If desired, en-
- Connected I/O Boards
026-1203 Rev 3 03-FEB-2015
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