Replacing The Control Unit - Siemens SINAMICS G120 Function Manual

Servicing and maintenance
5.1 Replacing components of the modular SINAMICS G120 inverter
5.1.2

Replacing the Control Unit

After commissioning has been completed, we recommend that you back up your settings on
an external storage medium, e.g.: on a memory card or the operator panel.
If you do not back up your data, you have to recommission the drive when you replace the
Control Unit.
Procedure for replacing a Control Unit with a memory card
● Disconnect the line voltage of the Power Module and (if installed) the external 24 V
● Remove the signal cables of the Control Unit.
● Remove the defective CU from the Power Module.
● Plug the new CU on to the Power Module. The new CU must have the same order
● Remove the memory card from the old Control Unit and insert it in the new Control Unit.
● Reconnect the signal cables of the Control Unit.
● Connect up the line voltage again.
● The converter adopts the settings from the memory card, saves them (protected against
● Switch on the motor and check the function of the drive.
180
supply or the voltage for the relay outputs DO 0 and DO 2 of the Control Unit.
number and the same or a higher firmware version as the CU that was replaced.
power failure) in its internal parameter memory, and switches to "ready to start" state.
Safety Integrated Function Manual, SINAMICS G120 and G120C
Function Manual, 01/2011, FW 4.4, A5E03052391B AB