Allen-Bradley Compact GuardLogix 5370 User Manual page 171

Table 31 - Effect of Safety-lock and Safety Task Signature on Download Operation
Safety-lock Status Safety Task Signature Status
Safety task signature in the offline project
matches the safety task signature in the
controller.
Controller safety-unlocked
Safety task signatures do not match.
Safety task signatures match.
Controller safety-locked
Safety task signatures do not match.
On Download
The existence of a safety task signature, and the controller's safety-lock status,
determines whether or not a download can proceed.
Download Functionality
All standard project components are downloaded. Safety tags are reinitialized to the values they
had when the safety task signature was created. The safety task is not downloaded. Safety lock
status matches the status in the offline project.
If the controller had a safety task signature, it is automatically deleted, and the entire project is
downloaded. Safety lock status matches the status in the offline project.
If the offline project and the controller are safety-locked, all standard project components are
downloaded and the safety task is re initialized to the values they had when the safety task
signature was created.
If the offline project is not safety-locked, but the controller is, the download is blocked and you
must first unlock the controller to allow the download to proceed.
You must first safety-unlock the controller to allow the download to proceed. If the controller had a
safety task signature, it is automatically deleted, and the entire project is downloaded. Safety lock
status matches the status in the offline project.
IMPORTANT During a download to a controller that is safety-unlocked, if firmware in
the controller is different than in the offline project, do one of the
following:
• Update the controller so that it matches the offline project. Once the
• Update the project to the controller version.
If you update the project, the safety task signature is deleted, and the
system requires revalidation.
Rockwell Automation Publication 1769-UM022C-EN-P - June 2018
Go Online with the Controller
update is completed, the entire project is downloaded.
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