Siemens SINAMICS G120 Operating Instructions Manual page 126

Installing
4.7 Connecting the inverter to the fieldbus
3. Wait until all LEDs on the inverter go dark.
4. Switch on the inverter supply voltage again.
Your settings become active after switching on.
You have now changed the bus address.
126
Converter with the CU240B-2 and CU240E-2 Control Units
Operating Instructions, 01/2016, FW V4.7 SP6, A5E34259001B AC