Rockwell Automation 1715-OF8I Redundant I/O System User Manual - Manual (Page 230)

230 Rockwell Automation Publication 1715-UM001C-EN-P - March 2014
Chapter 7 Using SIL 2 Add-On Instructions with 1715 Redundant I/O Modules
The appropriate data types are now available in your project.
Figure 67 - Data Types for 1715-IB16D Module with Duplex Configuration
Import Add-On Instructions to Upgraded Projects
To upgrade a project with new Add-On Instructions, follow these steps.
1. Upgrade the Add-on Profiles to SIL 2-capable versions.
2. Configure SIL 2=Yes in the module configuration and click Apply to
create the required module defined data types.
3. Import the new Add-On Instructions.
Create a Periodic Task for
SIL 2 Safety Functions
We recommend that your user application contain a single SIL task composed of
programs and routines that contain all of the logic for the SIL 2-rated safety
functions. This task must be the controller’s top-priority task, and the user-
defined watchdog must be set to accommodate the SIL task.
This task must be separate from all of the logic for the non-SIL 2-rated functions.
IMPORTANT You see the following warning for each Add-On Instruction import except the
first one. Each Add-On Instruction import overwrites the Add-On Instruction
called ‘CRC Calculator,’ and this warning appears because it is source protected.
Click OK.