Commissioning (hardware) 
  4.3 User memory concept 
SIMOTION D4x5-2 
Commissioning and Hardware Installation Manual, 02/2012 
103 
4.3.4  Module replacement 
SIMOTION module replacement 
A module replacement is detected automatically as of SIMOTION V4.3.   
During a module replacement, a CompactFlash card that contains the non-volatile 
SIMOTION data backed-up with _savePersistentMemoryData, is inserted in a new device of 
the same type.  
A module replacement is detected by the SIMOTION D4x5-2 on the basis of the serial 
number. The data backed up on the CompactFlash card with _savePersistentMemoryData is 
then automatically transferred to the new device. 
 
 
Note 
As an additional option, you can back up the non-volatile data by setting the Service selector 
switch, with the DIAG button or via IT DIAG, see Section Diagnostics data and non-volatile 
SIMOTION d
ata (Page 359). 
 
 
Initial power-up with the CompactFlash card 
Requirement: CompactFlash card (no device serial number stored) 
If the SIMOTION D4x5 2 powers up successfully with a new CompactFlash card, the serial 
number of the device is stored on the CompactFlash card. In this case, a module 
replacement cannot be detected. 
 
 
Note 
The serial number stored on the CompactFlash card remains unaffected by the following 
actions: 
•  Copy RAM to ROM 
•  Project download 
•  Writing the CompactFlash card via the SCOUT function "Load to file system" 
•  FW/project update via device update tool 
If the CompactFlash card contents are copied to another CompactFlash card, the serial 
number is also copied. 
A serial number stored on the CompactFlash card can only by removed by deleting the 
CompactFlash card contents.