User manual

Publication 1756-RM093F-EN-P - January 2010 33
CIP Safety I/O for the GuardLogix Control System Chapter 3
Configure Only When No Safety Signature Exists
This setting instructs the GuardLogix controller to configure a safety
module only when the safety task does not have a safety task
signature, and the replacement module is in an out-of-box condition,
meaning that a safety network number does not exist in the safety
module.
If the safety task has a safety task signature, the GuardLogix controller
only configures the replacement CIP Safety I/O module if the module
already has the correct safety network number, the module electronic
keying is correct, and the node or IP Address is correct.
Configure Always
The GuardLogix controller will always attempt to configure a
replacement CIP Safety I/O module if the module is in an out-of-box
condition, meaning that a safety network number does not exist in the
replacement safety module, and the node number and I/O module
keying matches the controller’s configuration.
ATTENTION
Enable the Configure Always feature only if the entire routable
CIP Safety control system is not being relied on to maintain
SIL 3 behavior during the replacement and functional testing of
a module.
If other parts of the CIP Safety control system are being relied
upon to maintain SIL 3, make sure that the controller’s
Configure Always feature is disabled.
It is your responsibility to implement a process to make sure
proper safety functionality is maintained during device
replacement.
ATTENTION
Do not place any modules in the out-of-box condition on any CIP
Safety network when the Configure Always feature is enabled,
except while following the module replacement procedure in
the GuardLogix Controllers User Manual, publication
1756-UM020
, or the 1768 Compact GuardLogix Controllers User
Manual, publication 1768-UM002
.