Ethernet Communications Modules, 3rd Edition, Rev. D
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Chapter 2: Setup and Installation
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An IP Address can be assigned to the ECOM module if your network requires one. Usually, the
IP Address is required in cases where PLCs are sharing the same network with PCs, and some of
the PCs are carrying out functions unrelated to PLC control. Normally, a network administrator
will assign an IP Address to each device on the network. If you have a separate dedicated
network for your PLCs, you can use the Module ID or a Name for each communication link.
You must use an IP Address, if you are using the UDP/IP or MODBUS TCP protocol.
Use NetEdit3 to assign an IP address to the ECOM (refer to chapter 3).
The module ships from the factory with an IP Address of 0.0.0.0. This is not a usable IP
Address for normal communications. It only serves as a default setting which can be changed
using NetEdit3. Valid settings are 1 through 254. You do not have to change the default IP
Address unless you are using the IP Address to link to your ECOM module. The default setting
does not cause conflicts with other network communications.
If you change the default IP Address for linking to other network devices, you must change all
four “0” fields. If any field contains the number 255 and other fields have been changed, the
module will not be recognized on the network.
Example:
Client (PC/ECOM) Subnet Mask: 255.255.0.0
Valid Client (PC/ECOM) IP Address: 192.168.50.2
Valid Server ECOM IP Address: 192.168.55.5
Valid Server ECOM IP Address: 192.168.70.15
WARNING: It is extremely important not to have duplicate IP Addresses on your network. If you are
using the IP Address to link the ECOM to any network devices (PCs or PLCs), the ECOM must have a
unique number.
Ethernet (MAC) Address
A unique Ethernet (MAC) Address is assigned to each module at the factory and will not
change. It is printed on a label attached to each ECOM module. The Ethernet (MAC) Address
is recognized by NetEdit3. The Ethernet (MAC) Address is a twelve digit number with no
deliberate relationship to your network or functional areas of your plant. It does not usually
serve as a convenient and easily remembered identifier for your ECOM.
Using Multiple Network Identifies
You can use the IP Address to satisfy network requirements, a Name for PCs running HMI
software and the Module ID for PLCs to share data among themselves. Using one type of
identifier does not limit your use of the other identifier types.
1–254 Valid settings for Bold number
fields (Do not duplicate).
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