Siemens SIMOTION D4x5-2 Commissioning And Hardware Installation Manual page 105

With the _savePersistentMemoryData system function, the user program can back up the
contents of the non‑volatile SIMOTION data to the CF card. This ensures that the retain
variables and the absolute encoder position are backed up in the event that a spare part is
used.
For the SINAMICS Integrated, CX32-2 and SINAMICS S120 CU310-2/CU320-2, the non-
volatile SINAMICS data (NVRAM data) is backed up by setting the CU parameter p7775 to
1.
Note
IP and DP parameters in the non-volatile data
If the CF card contains a configuration, the IP and DP parameters are loaded from the CF card
during power-up and used by the SIMOTION device. The SIMOTION D4x5‑2 uses the
addresses defined in these parameters to go online. During power-up, the IP and DP
parameters on the CF card are also written to the non‑volatile data. If the SIMOTION device
is then powered up with a CF card with no configuration, the IP and DP parameters are retained
in the non‑volatile data and are used by the device. Thus, the SIMOTION device can continue
to go online if a configuration was loaded with SIMOTION SCOUT at least once or if the
SIMOTION device is powered up with a CF card containing a configuration.
Volatile SIMOTION data (RAM / current data RAM)
The volatile SIMOTION data is defined by the following properties:
● The volatile SIMOTION data is located in the RAM memory of the SIMOTION device.
● The download data of SIMOTION SCOUT is written to this memory.
SIMOTION D4x5-2
Commissioning and Hardware Installation Manual, 03/2018, A5E33441636B
Commissioning (hardware)
5.3 User memory concept
105