To setup MODBUS TCP:

Press the OK-button at least 5 seconds. The next message appears:
Press button Up(=1), Down (=2) and OK (=3) to enter the password for the configuratiion menu: ▲▼OK ▲▼OK ▲▼(1 2 3 1 2 3 1 2).
Select Communication èLAN Conf è Modbus TCP (the default port is 502).
2 To modify the TCP port, select Modbus TCP è TCP Port, set the port number and long-press <Enter>.