Configuration User Manual

Rockwell Automation Publication ENET-UM001L-EN-P - March 2014 17
Chapter 3
Configure an EtherNet/IP Communication
Module to Operate on the Network
This chapter describes how to configure an EtherNet/IP communication module
to operate on an EtherNet/IP network.
Determine Network
Parameters
To operate an EtherNet/IP network, you must define these parameters.
Topic Page
Determine Network Parameters 17
Set the Network IP Address on a Module 18
Duplicate IP Address Detection 29
IP Address Swapping 30
DNS Addressing 31
Use EtherNet/IP Communication Modules in a Logix5000 Controller Application 32
EtherNet/IP Network Parameter Description
IP address The IP address uniquely identifies the module. The IP address is in the form xxx.xxx.xxx.xxx where each xxx is a number
from 000…254.
There are some reserved values that you cannot use as the first octet in the address. These numbers are examples
of values you cannot use:
• 001.xxx.xxx.xxx
• 127.xxx.xxx.xxx
• 223 to 255.xxx.xxx.xxx
The specific reserved values that cannot be used vary according the conditions of each application. The previous values
are only examples of reserved values.
Subnet mask Subnet addressing is an extension of the IP address scheme that allows a site to use a single network ID for multiple
physical networks. Routing outside of the site continues by dividing the IP address into a net ID and a host ID via the
class. Inside a site, the subnet mask is used to redivide the IP address into a custom network ID portion and host ID
portion. This field is set to 0.0.0.0 by default.
If you change the subnet mask of an already-configured module, you must cycle power to the module for the change
to take effect.
Gateway A gateway connects individual physical networks into a system of networks. When a node needs to communicate with
a node on another network, a gateway transfers the data between the two networks. This field is set to 0.0.0.0 by
default.