Before you begin, Configure ethernet/ip communication modules in a – Rockwell Automation 1756-RMxx ControlLogix Enhanced Redundancy System User Manual User Manual
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Rockwell Automation Publication 1756-UM535D-EN-P - November 2012
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Configure the EtherNet/IP Network
Chapter 4
Configure EtherNet/IP
Communication Modules in a
Redundant System
Use these procedures to configure EtherNet/IP communication modules used in
redundant chassis.
Before You Begin
Before you begin configuring the EtherNet/IP communication modules in the
redundant chassis, verify that these tasks have been completed:
• The redundancy modules are installed and connected in the redundant
chassis.
• A plan for IP address use has been executed:
– If you are using IP address swapping, plan for the use of two
consecutive IP addresses in the partnered set.
– If you are not using IP address swapping, plan for the use of two IP
addresses.
• Know the subnet mask and gateway address for the Ethernet network the
redundant modules are to operate on.
IMPORTANT
If controllers in the redundant chassis pair produce tags over an EtherNet/IP
network that controllers in remote chassis consume, the connection from the
remote controller to the redundant controller can briefly drop during a
switchover. This anomaly occurs if the EtherNet/IP communication modules in
the remote chassis do not use specific firmware revisions.
For the latest firmware revisions by product, go to
For more information on produced and consumed connections, see Logix5000
Controllers Produced and Consumed Tags user manual,
publication
IMPORTANT
Sockets are supported in the 1756-EN2T, 1756-EN2TR and 1756-EN2F modules,
firmware revision 5.008 or later. For additional information,
.
IMPORTANT
Unicast functionality in enhanced redundancy systems supports produced
tags. Unicast consumed tags are not supported.