Siemens SINAMICS G120 Operating Instructions Manual page 349

Replacing a Control Unit with data backup in the PC
Procedure
Proceed as follows to exchange the Control Unit:
1. Disconnect the line voltage to the Power Module and (if installed) the external 24 V
2. Remove the signal cables of the Control Unit.
3. Remove the defective Control Unit.
4. Mount the new Control Unit onto the Power Module.
5. Reconnect the signal cables of the Control Unit.
6. Connect up the line voltage again.
7. Open the project that matches the drive in STARTER.
8. Go online and transfer the settings from the PC into the inverter by pressing the
9. Save your settings (copy RAM to ROM ).
You have successfully replaced the Control Unit.
Converter with the CU250S-2 Control Unit (vector)
Operating Instructions, 06/2013, FW V4.6, A5E31759476B AB
10.3 Replacing the Control Unit without the safety functions enabled
supply or the voltage for the digital outputs of the Control Unit.
button.
The inverter signals faults after the download. Ignore these faults, as they will be
automatically acknowledged by the following steps.
Corrective maintenance
349