Siemens SINAMICS S120 Function Manual page 416

Basic functions
7.25 Upgrade the firmware and project
Amended data on the memory card
If the data on the working partition of the memory card and the backup partition is no longer
consistent, the warning "A01073: POWER ON for backup copy on memory card required" is
emitted. In this case, an entry is made in the diagnostic buffer of the Control Unit. A POWER
ON must therefore be performed to update the data on the backup partition.
Automatic restoration of defective data
If defective data is detected on the memory card, the system automatically restores the
relevant data. If, for example, the working partition of the memory card is damaged, this
partition is reformatted and restored with the data of the backup partition. In this case the
message "F01072: memory card recreated from backup copy" is emitted.
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Function Manual, 11/2017, 6SL3097-4AB00-0BP5
Drive functions