The controllers have 3 modes, Central, Stand-Alone, and Off. I believe from Site Pro you can send the command to switch from one to the other. It's under the multi-manual tab. I have 1 satellite that will occasionally switch to Stand-Alone, usually after a power interruption.
I will run a satellites with reports everyday to verify all are communicating and ready to download the nights programs. I set it to show the following options (No Communication/Response, Stand-Alone Mode, or Off). So run the report and if just shows the satellite names and no sub messages then we are good to go!
https://www.mytoronsn.com/Resources/Attachment?attachmentId=150&title=LTC%2B%20User%20Guide%20371-0011.pdf