Rockwell Automation 1768-EWEB EtherNet/IP Web Server Module User Manual - Manual (Page 41)

Publication ENET-UM527E-EN-P - October 2006
Configure a Network Address For a Web Server Module 41
When you change the IP address or connect a web server module to
an EtherNet/IP network, the module checks to make sure that the IP
address assigned to this module is not the same as that for any other
device already on the network.
If the module determines that there is a conflict (some other device on
the network already has the IP address), the EtherNet/IP port of the
module goes into conflict mode, where the module’s:
• OK LED indicator blinks red.
• network (NET) LED indicator is solid red.
• front 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
To correct this conflict, use the instructions in this chapter to change
the IP address of the module. Then cycle power to the module or
reset the module (such as disconnecting the EtherNet/IP cable and
reconnecting the cable).
There is also the possibility that two modules can detect a conflict
simultaneously. If this occurs, remove the module that has the
incorrect IP address or correct its conflict. To get the second module
out of conflict mode, cycle power to the module or disconnect its
EtherNet/IP cable and reconnect the cable.