Siemens SIMOTION D4x5-2 Commissioning And Hardware Installation Manual page 235

Automatic restoration at module replacement
● SINAMICS detects whether the control unit has been replaced on the basis of the serial
number.
● In this case, the NVRAM of the used control unit is deleted first after POWER ON.
The following are not deleted:
– CU operating hours counter
– CU temperature and
– Safety logbook
If there is an error-free PMEMORY.ACX or PMEMORY.BAK file on the CompactFlash card,
the data is then loaded to the NVRAM.
If no error-free backup file is available, power-up is as for SINAMICS < V4.5. A fault is not
issued and any existing "corrupt" backup files are not deleted.
Manual restoration
The manual restoration of the NVRAM data is performed by setting parameter p7775 to 2.
If the backup file (ACX or BAK) is error-free is, a warm restart is performed. The contents of
the NVRAM are deleted first and then the data is loaded from the backup file to the NVRAM.
The following are not loaded:
● CU operating hours counter
● CU temperature and
● Safety logbook
Parameter p7775 is set to 0 at the end of the restoration.
If the backup files are corrupt or no backup exists, the job is acknowledged with an error value
in parameter p7775.
Deleting the NVRAM data
The SINAMICS NVRAM data can only be deleted when none of the connected drives has a
pulse enable.
The deletion of the NVRAM data is performed by setting parameter p7775 to 3.
After setting p7775 to 3, a warm restart is performed automatically.
During the following power-up, first all NVRAM data is deleted on the control unit.
The following are not deleted:
● CU operating hours counter
● CU temperature and
● Safety logbook
At the end of the deletion, the initialization data of the applications is in the NVRAM, similar to
as after a device automatic commissioning (with the exception of the above-mentioned data).
Parameter p7775 is set to 0 at the end of the deletion.
SIMOTION D4x5-2
Commissioning and Hardware Installation Manual, 03/2018, A5E33441636B
7.5 Additional information on configuring the SINAMICS Integrated
Commissioning (software)
235