102 Rockwell Automation Publication 1756-UM013B-EN-P - October 2019
Chapter 5 Configure and Replace Safety Modules
Replacement with ‘Configured Always’ Enabled
When the ‘Configure Always’ feature is enabled, the controller automatically
checks for and connects to a replacement module that meets all the following
requirements:
• The controller has configuration data for a compatible module at that
network address.
• The module is in out-of-box condition or has an SNN that matches the
configuration.
If the project is configured for ‘Configure Always’, follow the appropriate steps to
replace a safety module.
1. Remove the old I/O module and install the new module.
2. Right-click your I/O module and choose Properties.
3. Click the Safety tab.
4. Click Reset Ownership.
5. Click OK.
6. Follow your company-prescribed procedures to functionally test the
replaced I/O module and system and to authorize the system for use.
ATTENTION: Enable the ‘Configure Always’ feature only if the entire CIP
Safety Control System is not being relied on to maintain SIL 3 behavior
during the replacement and functional testing of a module.
Do not place modules that are in the out-of-box condition on a CIP Safety
network when the Configure Always feature is enabled, except while following
this replacement procedure.
If Then
the module is in out-of-box condition go to step 6
.
No action is needed for the controller to take
ownership of the module.
an SNN mismatch error occurs (because the module
was previously owned)
go to the next step to reset the module to out-of-
box condition.
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