Rockwell Automation 1756-L7x GuardLogix 5570 Controllers - Manual (Page 98)

98 Rockwell Automation Publication 1756-UM022A-EN-P - November 2012
Chapter 6 Develop Safety Applications
Delete the Safety Task Signature
Click Delete to delete the safety task signature. The safety task signature cannot
be deleted when the following is true:
• The controller is safety-locked.
• The controller is in Run mode with the keyswitch in RUN.
• The controller is in Run or Remote Run mode with run mode protection
enabled.
Programming Restrictions Restrictions limiting the availability of some menu items and features (that is, cut,
paste, delete, search and replace) are imposed by the Logix Designer application
to protect safety components from being modified whenever the following is
true:
• The controller is safety-locked.
• A safety task signature exists.
• Safety faults are present.
• Safety status is as follows:
– Partner missing
– Partner unavailable
– Hardware incompatible
– Firmware incompatible
If even one of these conditions apply, you may not do the following:
• Create or modify safety objects, including safety programs, safety routines,
safety tags, safety Add-On Instructions, and Safety I/O modules.
• Apply forces to safety tags.
• Create new safety tag mappings.
• Modify or delete tag mappings.
• Modify or delete user-defined data types that are used by safety tags.
• Modify the controller name, description, chassis type, slot, and safety
network number.
• Modify or delete the safety task signature, when safety-locked.
ATTENTION: If you delete the safety task signature, you must retest and
revalidate your system to meet SIL 3/PLe.
Refer to the GuardLogix 5570 Controller Systems Safety Reference Manual,
publication
1756-RM099 , for more information on SIL 3/PLe requirements.
IMPORTANT The scan times of the safety task and safety programs can be reset
when online.