Rockwell Automation 1791ES-IB16 Guard I/O EtherNet/IP Safety Modules - Manual (Page 59)

Rockwell Automation Publication 1791ES-UM001D-EN-P - May 2013 59
Configure the I/O Modules by Using the Logix Designer Application Chapter 5
Configuration Signature
The configuration signature is created by the Logix Designer application and
verified by the safety module. The configuration signature provides SIL 3
integrity of the configuration of a Guard I/O module.
• When a GuardLogix controller first connects to an unconfigured Guard I/
O module, the complete configuration is downloaded to the
I/O module.
• Any time the GuardLogix controller attempts to connect to a Guard
I/O module, if the configuration signatures are the same, then the
configuration does not need to be downloaded, because they already
match.
• Any time the GuardLogix controller attempts to connect to a Guard
I/O module and the signatures do not match, the module checks the IP
address and safety network number. If these are all correct, the controller
will attempt to configure the module.