Rockwell Automation 1757-ABRIO Process Remote I/O (RIO) Communication Interface Module - Manual (Page 71)

Publication 1757-UM007D-EN-P - December 2008 69
Configuring RSLogix 5000 Software to Access Data on the 1757-ABRIO Module Chapter 5
Use the following steps to add the MSG instruction.
1. Add the MSG instruction to the ladder logic, along with
whatever logic you want to use to cause the instruction to
execute.
2. Open the Message Configuration dialog box by clicking the
button in the instruction.
3. Select the Message Type.
The Message type should be either CIP Data Table Read to read
a tag from the 1757-ABRIO module or CIP Data Table Write to
write a tag to the 1757-ABRIO module.
WARNING
The EN_CC bit in a ControlLogix MESSAGE tag defaults to on. If
the message executes successfully even once, it gets retried
periodically, even if the ladder logic has disabled the message.
If you want to keep the connection open no matter what, turn
on the bit.
Turn off the EN_CC bit in any ControlLogix MESSAGE tag you
use in a MSG instruction to access data on the 1757-ABRIO
module.