Rockwell Automation Publication 1769-UM022C-EN-P - June 2018 201
Appendix B
Change Controller Type
Because safety controllers have special requirements and do not support certain
standard features, you must understand the behavior of the system when you
change the controller type from standard to safety or from safety to standard in
your project. Changing controller type affects the following:
•Supported features
• Physical configuration of the project, that is the safety partner and
Safety
I/O
• Controller properties
• Project components such as tasks, programs, routines, and tags
• Safety Add-on Instructions
Change from a Standard to a
Safety Controller
Upon confirmation of a change from a standard controller to a safety controller
project, safety components are created to meet the minimum requirements for
a safety controller:
• Safety components are created (that is safety task, safety program, and so
forth).
The safety task is created only if the maximum number of downloadable
tasks has not been reached. The safety task is initialized with its default
values.
• A time-based safety network number (SNN) is generated for the local
chassis.
• Standard controller features that are not supported by the safety
controller, such as redundancy, are removed from the Controller
Properties dialog box (if they existed).
Topic Page
Change from a Standard to a Safety Controller 201
Change from a Safety to a Standard Controller 202
Change Safety Controller Types 202
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