Rockwell Automation Publication 1756-UM022D-EN-P - May 2017 119
Develop Safety Applications Chapter 6
The following actions are not permitted in the safety portion of the application
when the controller is safety-locked:
• Online/offline programming or editing (including safety Add-On
Instructions)
• Forcing safety I/O
• Changing the inhibit state of safety I/O or produced connections
• Safety data manipulation (except by safety routine logic)
• Generating or deleting the safety task signature
You can safety-lock the controller project regardless of whether you are online
or offline and regardless of whether you have the original source of the
program. However, no safety forces or pending online safety edits can be
present.
Safety-locked or -unlocked status cannot be changed when the key switch is in
the RUN position.
TIP The text of the online bar’s safety status button indicates the safety-lock status.
The application tray also displays the following icons to indicate the safety
controller’s safety-lock status.
• = controller safety-locked
• = controller safety-unlocked
TIP Safety-lock or -unlock actions are logged in the controller log.
For more information about accessing the controller log, refer to Logix5000
Controllers Controller Information and Status Programming Manual, publication
1756-PM015.
Safety Status Button
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