New member, but have lurked around in the past when working with the Vision series controllers. I recently started a project with a Unistream controller. I completed a nearly identical project in the past, but using the Vision controller. I've run into a couple of issues with communication on the Unistream.
The first issue I had was MODBUS over RS485. We are using 38.4kbps, 8N1 as the settings. I set this communication up with a Schneider Altivar 61 drive. It was configured exactly like the connection we had with the Vision controller, except now using the Unistream.