Rockwell Automation 1738-AENTR, Series A 1734 POINT I/O and 1738 ArmorPOINT I/O 2 Port Ethernet/IP Adapter User Manual - Manual (Page 70)

62 Rockwell Automation Publication 1734-UM014B-EN-P - June 2013
Chapter 5 Configure the Adapter for Direct Connection and Rack Optimization in RSLogix 5000 Software
4. Click the Connection tab.
The Module Fault error code displays at the bottom of the
Connection tab.
5. Click the Chassis Size tab.
6. Click Set Chassis Size in Module.