7. Switch off the inverter power supply.
8. Wait until all LEDs on the inverter are dark.
Decide whether you want to withdraw the memory card from the
inverter:
● The memory card contains a data backup:
⇒ The inverter has taken the settings from the memory card.
● There was no data backup on the memory card:
⇒ The inverter has the factory setting.
9. Switch on the inverter power supply again.
10. If the firmware downgrade was successful, after several seconds
the inverter LED RDY turns green.
If the memory card is still inserted, depending on the previous
content of the memory card, one of the two following cases has
occurred:
● The memory card contains a data backup:
⇒ The inverter has taken the settings from the memory card.
● There was no data backup on the memory card:
⇒ The inverter has the factory setting.
11. If the memory card did not contain a data backup of the inverter settings, then you must
transfer your settings to the inverter from another data backup.
Saving settings and series commissioning (Page 321)
You have replaced the inverter's firmware by an older version.
Memory cards with license
If the memory card includes a license, e.g. for the basic positioner, then the memory card must
remain inserted after the firmware has been updated.
Corrective maintenance
9.3 Firmware upgrade and downgrade
SINAMICS G120C converter
396 Operating Instructions, 09/2017, FW V4.7 SP9, A5E34263257B AF
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