Rockwell Automation 1732DS-IB8 User Manual page 57

Connection
Faulted
A connection status tag exists for every connection.
If the RPI and CRTL for the network are set appropriately,
then this status tag will always remain HI. Monitor all
connection status bits to verify that they are not going LO
intermittently due to timeouts.
The configuration signature is created by RSLogix 5000 software
and verified by the safety module. The configuration signature
provides SIL 3 integrity of the configuration of a 1791DS module.
When a GuardLogix first connects to a 1791DS module, the
complete configuration is downloaded to the I/O module.
Any time the GuardLogix controller attempts to connect to a
1791DS 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
1791DS module and the signatures do not match, the module
will check the module node number, keying, and safety
network number. If these are all correct, the controller will
attempt to configure the module.
Configure Modules in RSLogix 5000 Software
Publication 1791DS-UM001H-EN-P - April 2009
53