Rockwell Automation 1715-OF8I Redundant I/O System User Manual - Manual (Page 237)

Rockwell Automation Publication 1715-UM001C-EN-P - March 2014 237
Using SIL 2 Add-On Instructions with 1715 Redundant I/O Modules Chapter 7
6. Create a tag for the Reconciled Input Data by using the default data type
and Read/Write External Access.
The tag can be controller- or program-scoped.
7. Enter the module RPI.
To optimize system bandwidth, type the same RPI value from the module
configuration dialog box.