T3-TB, TSTAT10 and OpenHAB

Still testing on the bench. Brought up a T3-TB on Ethernet and a TSTAT10 on BACNET/MSTP on the RS485 Sub port. The T3000 software sees both devices.

Then I brought up the ConnectorIO BACNet binding on Openhab. It sees the T3-TB, but there seems to be some problem recognizing objects on the TSTAT10. I loaded WACNet and it has the same issue. It sees BACNET objects in the T3-TB, and lists the serial number of the TSTAT10, but throws errors when it tries to load objects.

Any thoughts on what to try next?

Good troubleshooting notes.
Show us a wieshark log and perhaps we can spot something.