Siemens SINUMERIK 840D sl Commissioning Manual page 1061

Note
Data backup and restore with CompactFlash cards
If there is a CompactFlash card in the slot of the PCU, you will not be able to back up or
restore data via the Service Center.
Instead, start the program "ghost32.exe" via the prompt of the service center.
PCU Base Software (IM10)
Commissioning Manual, 03/2013, 6FC5397-1DP40-3BA1
Backing up and restoring data
5.3 Functions of the Service Center
59