Owner manual

Rockwell Automation Publication 1756-UM022A-EN-P - November 2012 133
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
changing the controller type from standard to safety or from safety to standard in
your controller 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
Changing from a Standard to
a Safety Controller
To successfully change the controller type from a standard controller to a safety
controller, the chassis slot immediately to the right of the safety primary
controller must be available for the safety partner.
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:
• 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.
• Safety components are created (that is safety task, safety program, and so
forth).
• A time-based safety network number (SNN) is generated for the local
chassis.
Topic Page
Changing from a Standard to a Safety Controller 133
Changing from a Safety to a Standard Controller 134
Changing Safety Controller Types 134
Additional Resources 135
IMPORTANT
GuardLogix 5560 controllers and 1768 Compact GuardLogix controllers are not
supported in Studio 5000 version 21 or later.