Rockwell Automation Publication 1756-RM093J-EN-P - April 2018 59
Safety Application Development Chapter 6
For information on using the safety-lock feature, refer to the GuardLogix
Controllers User Manual, publication 1756-UM020
, or the 1768 Compact
GuardLogix Controllers User Manual, publication 1768-UM002
.
Downloading the Safety
Application Program
Upon download, application testing is required unless a safety task signature
exists.
Downloads to a safety-locked GuardLogix controller are allowed only if the
safety task signature, the hardware series, and the operating system version of the
offline project all match those contained in the target GuardLogix controller and
the controller’s safety task status is OK.
Uploading the Safety
Application Program
If the GuardLogix controller contains a safety task signature, the safety task
signature will be uploaded with the project. This means that any changes to
offline safety data will be overwritten as a result of the upload.
Online Editing
If there is no safety task signature and the controller is safety-unlocked, you can
perform online edits to your safety routines.
Pending edits cannot exist when the controller is safety-locked or when there is a
safety task signature. Online edits may exist when the controller is safety-locked.
However, they may not be assembled or cancelled.
See page
61 for more information on making edits to your application program.
To verify the integrity of every download, you must manually record the
safety task signature after initial creation and check the safety task
signature after every download to make sure that it matches the original.
If the safety task signature does not match and the controller is
safety-locked, you must unlock the controller to download. In this case,
downloading to the controller deletes the safety task signature. As a result,
you must revalidate the application.
ATTENTION: The USB port is intended for temporary local programming
purposes only and not intended for permanent connection.
You cannot edit standard or safety Add-On Instructions while online.
Online edits in standard routines are unaffected by the safety-locked or
-unlocked state.
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