User manual

52 Publication ENET-UM001I-EN-P - January 2010
Chapter 4 Configure an EtherNet/IP Module to Operate on the Network
When you change the IP address or connect one of these modules to an
EtherNet/IP network, the module checks to make sure that the IP address
assigned to this module does not match the address of any other network
device. If the module determines that another device on the network with a
matching IP address, the EtherNet/IP port of the module goes into conflict
mode, where the module’s:
• OK status indicator blinks red.
• Network (NET) status indicator is solid red.
• front display indicates the conflict (1756-ENBT, 1756-EN2F,
1
756-EN2T
, 1756-EN2TR, and 1756-EN2TXT).
The display scrolls:OK <IP_address_of_this_module> Duplicate IP
<Ma
c_a
ddress_of_duplicate_node_detected>
For example: OK 10.88.60.196 Duplicate IP - 00:00:BC:02:34:B4
To resolve 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 modules,
such as disconnecting and then reconnecting the EtherNet/IP cable cable.
Two modules could possibly detect a conflict
simultaneously. If this occurs,
perform this procedure.
1. Remove the module with the incorrect IP address or correct its conflict.
2. Cycle power to the second module or disconnect its EtherNet/IP cable
3. Reconnect the cable.
1788-ENBT 2.1 and later
1794-AENT Series A - 3.x and later
Series B - 4.1 and later
2x-COMM-E 1.1 and later
Cat. No. Firmware Revision