24 • XR75CX I&O Manual 026-1210 Rev 4
6. By default, each device in the network list has a
board number of 0. To set the address and begin
communication, choose the device and press .
In the list of MODBUS devices, choose the address
number corresponding to the XR75CX address set
up through the front display, and press
to
select it. A window will open where you can specify
the address of the controller. If a network ID has
already been selected, its name will be shown next
to the network ID in this list. If the network ID you
are trying to assign has already been used, you must
set the address on this device to a different number
that is not being used.
7. Repeat Steps 5 and 6 until each device has a name
and address.
8. When finished, press
to return to the Network
Setup menu, then press
- Network Summary
(Figure 18-6). Locate the devices you set up, and
look at each device’s status in the Status field. You
will see one of the following messages:
• Online - The device is communicating normally.
• Offline - The device is not communicating, has not
been commissioned, is not functional, or is not
powered up. Verify the device is powered up, wired
correctly, and has the proper network address, baud
rate, and parity.
• Unknown - The device is not communicating or has
not been commissioned. Verify the device is
powered up, wired correctly, and has the proper
network address, baud rate, and parity.
• No Port - No port is set up in the E2 Serial
Configuration Manager to be a MODBUS port.
• Wrong FW Rev - This message is likely caused by
the device having a firmware version older than the
minimum revision required by E2 for
communication. Replace the device with a new one
or a device that has the latest version of firmware on
it.
18.4.Wiring Types
Emerson specifies Belden #8761 shielded twisted pair
cables for use as MODBUS wiring (or Belden #82761 and
Belden #88761 for plenum installations).
For MODBUS network wiring of XR75CX controllers to
E2, Belden #8641 (Emerson P/N 135-8641) is the
recommended wire type to use.
Figure 18-6 - Network Summary Screen
Figure 18-7 - List of MODBUS Devices
Figure 18-8 - Network Summary Screen
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