Siemens SIMOTION D410 Series Commissioning Manual page 39

Backing up non-volatile SIMOTION data
You have the following options for backing up non-volatile SIMOTION data on the
CompactFlash Card:
● In the user program
● Using a switch setting (SIMOTION D410 service selector switches) or IT DIAG
On the system side, this system function ensures that a consistent overall image of the non-
volatile SIMOTION data is always available the next time the unit is switched on, even if
there is a power failure during backup. An already existing backup file is renamed to
"PMEMORY.BAK" before a new backup file is generated. If the save operation to the new
backup file fails (e.g. because the capacity of the CompactFlash Card is insufficient), this
backup copy of the backup file is used the next time an attempt is made to restore the non-
volatile SIMOTION data content. If the new file is successfully created, the backup copy of
the backup file is deleted.
NOTICE
Non-volatile SIMOTION data that is not backed up to the CompactFlash Card will be lost if
a spare part is installed (in the event of a module defect)! For example, failing to back up
the current values of the retain variables will result in them being lost and reset to their
initial values.
If an absolute encoder overflow occurs after _savePersistentMemoryData, the actual
position value is no longer correct after the non-volatile data is restored. In this case,
homing (absolute encoder adjustment) must be repeated.
With the SCOUT functions "Back up variables" and "Restore variables", you also have the
option of backing up to your PC and restoring data that were changed during operation and
only stored in the runtime system.
SIMOTION D410
Commissioning Manual, 02/2012
With the _savePersistentMemoryData system function, the user program can back up the
non-volatile SIMOTION data content to the CompactFlash Card. This ensures that the
retain variables and the absolute encoder position are backed up in the event that a
spare part is used. The contents are saved to the "PMEMORY.XML" backup file in the
"USER\SIMOTION" directory.
For information on this, refer to the section titled Diagnostic data and non-volatile
SIMOTION data (Page 201). The contents are saved to the "PMEMORY.XML" backup
file in the "USER\SIMOTION\HMI\SYSLOG\DIAG" directory.
Commissioning (hardware)
2.5 User memory concept
39