Siemens SIMOTION D410 Series Commissioning Manual page 35

Current RAM
If you change the system variable values, these take immediate effect in the current RAM.
New configuration data values are initially stored in the Next memory. Configuration data that
take immediate effect are automatically transferred to the current RAM. Configuration data
that will only become active following a RESTART on the technology object (set the
restartactivation system variable to the ACTIVATE_RESTART value) are only written to the
current RAM once the RESTART has taken place.
To save the configuration data changed online to the offline project, you must first transfer
the content of the current RAM to the RAM using the menu command "Target system" >
"Copy current to RAM".
Once you have done this, the configuration in SCOUT will no longer be consistent with the
configuration in the target device, as a consistency check is performed on the RAM data.
Read the data from the RAM using the menu command "Target system" > "Load" > "Load to
PG" (for configuration data only) to re-establish a consistent system state.
To save the configuration on the CompactFlash Card with protection against power failures,
execute the menu command "Target system" > "Copy RAM to ROM".
Note
The "Copy current to RAM" command does not transfer the values of the system variables to
the RAM memory. This means that it is not possible to execute "Save to memory card (Copy
RAM to ROM)" or "Save in the engineering project (Load to PG)".
In order to ensure that system variable values can also be saved to the engineering project
and memory card, the system variable values must be changed OFFLINE before being
downloaded to the target device and saved.
Startup of SIMOTION D410
The SIMOTION kernel is loaded from the CompactFlash Card to the "volatile data" area
during the startup of SIMOTION D410.
Volatile data is lost if you shut down the SIMOTION D410 module after the download. Data
loaded from the CompactFlash Card at the next restart:
● The technology packages and user data to the "volatile data" area
● IP and DP parameters to the "non-volatile data" area
D410
Commissioning Manual, 05/2009
Commissioning (hardware)
2.5 User memory concept
35