Rockwell Automation Publication 1756-RM012B-EN-P - April 2018 59
Safety Application Development Chapter 6
Editing Your Safety
Application
The following rules apply to changing your safety application program in the
Studio 5000 Logix Designer application:
• Only authorized, specially trained personnel can make program edits.
These personnel must use all supervisory methods available, for
example, using the controller key switch and software password
protections.
• When authorized, specially trained personnel make program edits, they
assume the central safety responsibility while the changes are in progress.
These personnel must also maintain safe application operation.
• When you edit online, you must use an alternate protection mechanism
to maintain the safety of the system.
• You must sufficiently document all program edits, which include the
following:
–Authorization
–Impact analysis
–Execution
–Test information
– Revision information
• If online edits exist only in the standard routines, those edits are not
required to be validated before returning to normal operation.
• You must make sure that changes to the standard routine, regarding
timing and tag mapping, are acceptable to your safety application.
• You can edit the logic portion of your program while offline or online, as
described in the following sections.
Performing Offline Edits
When offline edits are made to only standard program elements, and the safety
signature matches following a download, you can resume operation.
When offline edits affect the safety program, you must revalidate all affected
elements of the application, as determined by the impact analysis, before you
resume operation.
Figure 18 on page 61
illustrates the process for offline editing.
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