Siemens SIMOTION D4 5-2 Series Commissioning And Hardware Installation Manual page 95

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
takes immediate effect is 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) is not written to the
current RAM until after the RESTART.
To save the configuration data changed online to the offline project, you must first transfer
the content of the current data RAM to the RAM using the menu command "Target system" >
"Copy current data 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
CPU / drive unit to PG" (for the configuration data only) to re-establish a consistent system
state.
Use the "Target system" > "Copy RAM to ROM" menu command to save the configuration to
the non-volatile memory on the CompactFlash card.
Note
The "Copy current data to RAM" command does not transfer the values of the system
variables to the RAM memory. This means that "Save to memory card (Copy RAM to ROM)"
or "Save in the engineering project (Load CPU / drive unit to PG)" is not possible.
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 and then
downloaded to the target device and saved.
SIMOTION D4x5-2 power-up
During power-up of the SIMOTION D4x5-2, the SIMOTION Kernel is loaded from the
CompactFlash card to the "volatile SIMOTION data" area.
When the SIMOTION D4x5-2 is switched off, the contents of the "volatile SIMOTION data"
area are lost. When the SIMOTION D4x5-2 is powered up again, the following data is loaded
from the CompactFlash card:
● Technology packages and user data to the "volatile SIMOTION data" area
● IP and DP parameters to the "non-volatile SIMOTION data" area
SIMOTION D4x5-2
Commissioning and Hardware Installation Manual, 02/2012
Commissioning (hardware)
4.3 User memory concept
95