Rockwell Automation 1791DS-IBxxxx Guard I/O DeviceNet Safety Modules - Manual (Page 120)

120 Rockwell Automation Publication 1791DS-UM001J-EN-P - May 2013
Chapter 7 Considerations When Replacing Guard I/O Modules
If you download this configuration to a temporary setup, place the module
on the network and it automatically connects to the SmartGuard
controller.
If the configuration downloaded to the module was not from the original
DNT file, the configuration signature will not match the original. Even if
you recreate the same parameters in a new DNT file, the time and date
portions of the signature will be different so the connection to the
SmartGuard controller is not made. If this occurs, click the Safety
Connection tab for the SmartGuard controller that prompts you that the
signature is different and provides you with the option to match the new
signature. However, you should first re-validate the safety system, because
it is not using the original DNT file.
7. Click Yes.
This takes the SmartGuard controller our of RUN mode.
You see this dialog box.
8. Click Yes to download the new connection configuration to the
SmartGuard controller.
After the download is complete, place the SmartGuard controller back in
RUN mode and the connection to the replacement module is established.