Siemens SIMOTION D4 5-2 Series Commissioning And Hardware Installation Manual page 219

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.
Explanations for p7775
The following jobs can be issued via p7775:
1: Backup NVRAM data (on CompactFlash card)
2: Restore NVRAM data (from CompactFlash card)
3: Delete NVRAM data on CU
The acknowledgement of a job is delayed.
● If the job cannot be executed, it is acknowledged negatively.
● If the job can be executed, it is acknowledged with the value 255.
Acknowledgements of the parameter jobs
Table 6- 6
Value
17
20
107
132
204
255
SIMOTION D4x5-2
Commissioning and Hardware Installation Manual, 02/2012
6.5 Additional information on configuring the SINAMICS Integrated
Acknowledgements of the parameter jobs
Cause
Request cannot be executed because of the operating state
Illegal value
Write access is not permitted (cause: At least one DO has a pulse enable).
As the SINAMICS has to perform a warm restart when restoring and deleting the data,
none of the connected drives must have a pulse enable
Parameter change blocked (see p0300, p0400, p0922, p7760, macro being executed)
Write access not permitted
"OK": Job being executed
Commissioning (software)
219