[Updated] You can use Yabe to change the station number, same as the network ID, or modbus ID as it used to be called, using AV7.
Or you can make your way through the keypad menu system, there you will find the ‘Modbus ID’ in the old firmware, now called ‘Device ID’ in the more recent firmware and change this to a new ID.
Lastly, you could try connecting over the Ethernet port with the t3000 gui where you can get at all the various settings for the device including the MSTP network (MAC or device) ID and bacnet device instance.
Maurice Duteau