60 Rockwell Automation Publication 1756-RM012B-EN-P - April 2018
Chapter 6 Safety Application Development
Performing Online Edits
If online 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
shows the process for online editing.
The safety-lock and safety signature features of the GuardLogix controller
affect online edits.
See Generate the Safety Signature on page 52
and Lock the Controller on
page 55 for more information.
For detailed information on how to edit Ladder Logic in the Studio 5000
Logix Designer application while online, see the Logix5000 Controllers Quick
Start, publication 1756-QS001
.
Modification Impact Test
Any modification, enhancement, or adaptation of your validated software must
be planned and analyzed for any impact to the functional safety system. All
appropriate phases of the software safety lifecycle must be conducted as
indicated by the impact analysis.
At a minimum, you must perform these actions:
• Functional tests of all impacted software.
• Document all modifications to your software specifications.
• Document all test results.
For detailed information, see IEC 61508-3, Section 7.8 Software
Modification.
TIP Limit online edits to minor program modifications such as setpoint changes or
minor logic additions, deletions, and modifications.
To Next Page
Loading...
Need help?
General
