Rockwell Automation 1756-Enxxx_Ewxxx EtherNet/IP Modules Installation Instructions User Manual

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Rockwell Automation Publication ENET-IN002F-EN-P - January 2014

Install a 1756 EtherNet/IP Communication Module Chapter 1

Set the Network IP Address with RSLinx Software or the Studio 5000
Environment

This table describes when to set the network IP address with RSLinx software or
the Studio 5000 environment.

Consider these factors when you determine how to set the network IP address:

• Network isolation from or integration into the plant/enterprise network

• Network size - For large networks, isolated networks, it might be more

convenient and safer to use a BOOTP/DHCP server rather than the
Studio 5000 environment or RSLinx software. The BOOTP/DHCP
server also limits the possibility of assigning duplicate IP addresses.

• Company policies and procedures dealing with plant-floor network

installation and maintenance

• Level of involvement by IT personnel in plant floor network installation

and maintenance

• Type of training offered to control engineers and maintenance personnel

If you use the Rockwell Automation BOOTP or DHCP server in an uplinked
subnet where an enterprise DHCP server exists, a module may get an address
from the enterprise server before the Rockwell Automation utility even sees the
module. You might have to disconnect from the uplink to set the address and
configure the module to retain its static address before reconnecting to the
uplink. This is not a problem if you have node names configured in the module
and leave DHCP enabled.

Conditions

Software to Use

Page

• A BOOTP server is not available.

• The EtherNet/IP communication module is connected to another

NetLinx network.

RSLinx

The Studio 5000 project is online with a controller that communicates to or

through the EtherNet/IP communication module.

Studio 5000 environment