32 Rockwell Automation Publication 1756-UM004C-EN-P - June 2021
Chapter 3 Connect Redundant EtherNet/IP Adapters
Adapter Qualification
In a Redundant Adapter configuration, one adapter takes the Primary role and
a second adapter becomes Qualified Secondary ready to take I/O control in the
event that the primary becomes disqualified.
To complete the qualification process the following conditions must be met.
The modules must:
• have the same firmware revision.
• reside in slots 0 and 1 of the same chassis.
• be initially set to the same IP address.
• have at least one Ethernet port link active.
• be connected to the same Ethernet network.
Configure a 1756-EN4TR
Redundant Adapter Pair
To configure a 1756-EN4TR redundant adapter pair, use the following steps.
1. To set the IP address, see page 28
.
2. Make sure you are using Logix Designer in the offline mode.
3. In the I/O configuration tree, add the 1756-EN4TR in slot 0.
4. Name your module and enter the IP Address.
5. Click change under the module definition pane, and select "Yes" for
redundancy.
IMPORTANT
Do not put any devices in slot 1 in the I/O configuration tree.
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