Siemens SINAMICS G120XA - Firmware Downgrade

10.3.3 Firmware downgrade
Overview
When downgrading the firmware, you replace the converter firmware by an older version.
Precondition
● Converter and memory card have different firmware versions.
● The settings have been saved on a memory card or in an operator panel.
Function description
Procedure
1. Switch off the converter power supply.
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2. Wait until all LEDs on the converter are dark.
3. Insert the card with the matching firmware into the converter slot
until it latches into place.
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4. Switch on the converter power supply again.
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5. The converter transfers the firmware from the memory
card into its memory.
The transfer takes approximately 5 … 10 minutes.
While data is being transferred, the LED RDY on the con‐
verter stays red. The LED BF flashes orange with a vari‐
able frequency.
6. At the end of the transfer, the LED RDY and BF slowly flash red
(0.5 Hz).
Power supply failure during transfer
The converter firmware will be incomplete if the power supply fails
during the transfer.
● Start again with Step 1 of these instructions.
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Corrective maintenance
10.3 Firmware upgrade and downgrade
SINAMICS G120XA converter
Operating Instructions, 03/2019, FW V1.0, A5E44751205B AB 857