Rockwell Automation 1756-DHRIO_DHRIOXT ControlLogix Data Highway Plus-Remote I/O Communication Interface Module - Manual (Page 91)

Rockwell Automation Publication 1756-UM514C-EN-P - June 2014 91
Messaging Between ControlLogix Controllers and PLC-5 or SLC 5/04 Controllers Chapter 7
Configure the Module Switches
In this application, channel A on the 1756-DHRIO and 1756-DHRIOXT
modules must be set for DH+.
Configure Message Instructions
Use the Studio 5000 environment to configure the ControlLogix controller
message instructions. The following figure shows the message instruction tabs
necessary for this example.
Configuration Tab Communication Tab