Rockwell Automation Publication 1756-RM012B-EN-P - April 2018 27
Safety I/O for the GuardLogix Control System Chapter 3
Figure 7 - Safety I/O Replacement Options
Configure Only When No Safety Signature Exists
This setting instructs the GuardLogix controller to configure a safety device
when the safety task does not have a safety signature, and the replacement
device is in an out-of-box condition with no safety network number.
If the controller has a safety signature, the GuardLogix controller automatically
configures the replacement Safety I/O device if all of the following are true:
• The device already has the correct safety network number.
• The device electronic keying is correct.
• The node or IP address is correct.
To set the proper safety network number (SNN) when a controller safety
signature exists, a manual action is required to download the proper SNN. Go
online to the GuardLogix or CompactGuardLogix controller with the Studio
5000 Logix Designer application, then open the Module Properties dialog,
General tab, and click the “…” button next to the Safety Network Number. Use
the Set button to write the SNN to the module manually. After the manual
action, the remainder of the configuration is automatically downloaded.
For detailed information, see the ‘Replace a Safety I/O Device’ procedure in
the user manual for the controller:
• ControlLogix 5580 and GuardLogix 5580 Controllers User Manual,
publication 1756-UM543
• CompactLogix 5380 and Compact GuardLogix 5380 User Manual,
publication 5069-UM001
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