The MDS4310 can certainly communicate Modbus protocol. However, that frequency band is subject to FCC narrowbanding and is secondary for Data and I don't think those radios will support the 12.5K Channel required. I just replaced mine with MDS SD9s and have had a good experience. The narrow banding does require a new FCC document.
In my case, I actually just got new licenses, as someone had come in and stepped on me as a primary broadcaster.
> We need to check list if MDS Radio 4310 can be made to communicate to SCADAPack
> 334 over modbus RTU protocoal.