Duplicate ip address detection – Rockwell Automation 1734-AENTR EtherNet/IP Network Configuration User Manual User Manual
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Rockwell Automation Publication ENET-UM001L-EN-P - March 2014
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Configure an EtherNet/IP Communication Module to Operate on the Network Chapter 3
Reset the Module IP Address to Factory Default Value
You can reset the module’s IP address to its factory default value with the
following methods:
• If the module has rotary switches, set the switches to 888 and cycle power.
• If the module does not have rotary switches, use a MSG instruction to the
reset the IP address.
Duplicate IP Address
Detection
Some EtherNet/IP communication modules support duplicate IP
address detection. The module verifies that its IP address does not match any
other network device’s IP address when you perform either of these tasks:
• Connect the module to a EtherNet/IP network.
• Change the module’s IP address.
If the module’s IP address matches that of another device on the network, the
module’s EtherNet/IP port transitions to Conflict mode. In Conflict mode, these
conditions exist:
• OK status indicator is blinking red.
• Network (NET) status indicator is solid red.
• On some EtherNet/IP communication modules, the module status display
indicates the conflict.
The display scrolls:OK <IP_address_of_this_module> Duplicate IP
<Mac_address_of_duplicate_node_detected>
For example: OK 10.88.60.196 Duplicate IP - 00:00:BC:02:34:B4
• On some EtherNet/IP communication modules, the module’s diagnostic
webpage displays information about duplicate IP address detection.
For more information on which EtherNet/IP communication modules
support displaying duplicate IP address on their diagnostic webpage, see
the Technical Note titled Logix modules Duplicate IP address detection
enhancement, #118216, in the Technical Support Knowledgebase
available at
.