Rockwell Automation 1756-RMxx ControlLogix Enhanced Redundancy System User Manual - Manual (Page 86)

86 Rockwell Automation Publication 1756-UM535D-EN-P - November 2012
Chapter 4 Configure the EtherNet/IP Network
Options for Setting the IP Addresses of EtherNet/IP Communication
Modules
By default, ControlLogix EtherNet/IP communication modules ship with the IP
address set to 999 and with Bootstrap Protocol (BOOTP)/Dynamic Host
Configuration Protocol (DHCP)-enabled.
Use one of these tools to set the IP addresses for your EtherNet/IP
communication modules:
• Rotary switches on the module
• RSLinx Classic communication software
• RSLogix 5000 software
• BOOTP/DHCP utility - Provided with RSLogix 5000 software
Half/Full Duplex Settings
The enhanced redundancy system uses the duplex settings of the EtherNet/IP
communication module that is currently the primary. After a switchover, the
duplex settings of the new primary EtherNet/IP communication module are
used. By default, the duplex setting is automatic. We recommend that you use
this setting whenever possible.
To avoid communication errors, configure both the primary and secondary
EtherNet/IP communication modules with the same duplex settings. Using
different duplex settings on partnered EtherNet/IP communication modules
can result in messaging errors after a switchover.