Replace Control Unit - Siemens SINAMICS G120 Operating Instructions Manual

9.2.2

Replace Control Unit

Electric shock as a result of an autonomous voltage at the Control Unit that is independent
of the device supply voltage
230 V AC may be in place on terminals DO 0 and DO 2 of the control unit's relay output
independently of the voltage status of the power module. Touching the contacts may result
in an electrical shock.
Comply with the protective measures before you replace the Control Unit
1. Switch the Control Unit contacts into a no-voltage condition.
2. Secure the power supply against being unintentionally switched on again.
3. Check that the cabinet is de-energized.
Replacing a Control Unit with data backup on a memory card
If you use a memory card with firmware, after the replacement, you obtain a precise copy
(firmware and settings) of the replaced Control Unit.
Precondition
You have a memory card with the actual settings of the Control unit to be replaced.
Procedure
To replace the Control Unit, proceed as follows:
1. Disconnect the line voltage to the Power Module and (if installed) the external 24 V supply
or the voltage for the digital outputs of the Control Unit.
2. Remove the signal cables from the Control Unit.
3. Remove the defective Control Unit.
4. Mount the new Control Unit on the Power Module. The new Control Unit must have the
same article number and the same or higher firmware version as the Control Unit that was
replaced.
5. Remove the memory card from the old Control Unit and insert it in the new Control Unit.
6. Reconnect the signal cables of the Control Unit.
7. Connect up the line voltage again.
8. The inverter loads the settings from the memory card.
9. After loading, check whether the inverter outputs alarm A01028.
– Alarm A01028:
– No alarm A01028:
Converter with the CU230P-2 Control Units
Operating Instructions, 09/2017, FW V4.7 SP9, A5E34257946B AE
WARNING
The loaded settings are not compatible with the inverter.
Clear the alarm with p0971 = 1, and recommission the drive.
The inverter accepts the settings that have been loaded.
Corrective maintenance
9.2 Replacing inverter components
419