The Super 6 does currently not support MIDI over USB. In the meantime, MIDI over DIN offers much of the standard MIDI functionality.
To be able to use your Super 6 in conjunction with a DAW, you need to connect the Super 6 to the MIDI ports of your audio interface (in case your audio interface does have MIDI ports). You may also use a USB to MIDI interface like the UM-ONE mk2 by Roland in-between your computer and your Super 6.
Once the Super 6 is connected to the audio or MIDI interface, make sure that your DAW sends and receives the MIDI data you'd like the Super 6 to receive and send via the MIDI ports of your audio or MIDI interface. If connected via the MIDI ports, you can't select the Super 6 directly as the MIDI device (as it would be the case if full USB MIDI was supported), but only the MIDI interface the Super 6 is currently connected to. Also ensure that the correct MIDI channel is set up on all devices.
Last but not least, make sure that the global parameter LOCAL is set to "off" to avoid any MIDI loops during recording and playback.