Rockwell Automation 1738-AENTR, Series B POINT I/O and ArmorPOINT I/O Dual Port EtherNet/IP Adapters User Manual - Manual (Page 71)

Rockwell Automation Publication 1734-UM017B-EN-P - October 2013 63
Configure the Adapter for Direct Connection and Rack Optimization in RSLogix 5000 Software Chapter 5
9. In the New Module screen select the Connection Tab.
10. Verify that the Requested Packet Interval (RPI) used for the rack-
optimized connection to the I/O modules is appropriate for your system
(20.0 ms for this example). If not, change it to the correct value.
11. Click OK to accept the configuration.
The 1734-AENTR/B adapter appears indented under the local
1756-ENBT bridge module in the I/O Configuration folder.
IMPORTANT To avoid overloading the adapter, it is recommended that the RPI be
no less than 10.0 ms for rack connections and 50.0 ms for direct
connections.