Siemens SINUMERIK 840D sl Commissioning Manual

3.2 Backup license
Validity of the license key
The license key corresponds to the serial number of the CompactFlash Card. If the
CompactFlash Card is replaced for a SINUMERIK 840D sl, the license key loses its validity
and the system is no longer ready for operation.
This situation can occur for a defective hardware of the system CompactFlash Card.
Application
For the following cases, backup the license key of the CompactFlash Card on a USB storage
medium or on a network drive:
● Software update without license key
● System software error without defective hardware
Note
Replacement CompactFlash Card
The following data are required in order to obtain a valid license key after replacing the system
CompactFlash Card: The serial number of the defective and the new CompactFlash Card.
Service and diagnostics
3.2 Backup license
NCU operating system
Commissioning Manual, 12/2017, 6FC5397-1DP40-6BA1 69

Siemens SINUMERIK 840D sl Specifications

General

Control Type	CNC
Number of Axes	Up to 31
Max Number of Channels	10
Interfaces	Ethernet, PROFIBUS, PROFINET, USB
Interpolation	5-axis interpolation
Operating Temperature	0°C to 45°C
Relative Humidity	Up to 95% (non-condensing)
Display	TFT color display, various sizes
Programming Languages	DIN/ISO
Safety Features	Safety Integrated
PLC	Integrated PLC S7-300
Drive Interface	SINAMICS S120
Data Storage	CF card, USB
Operating System	Windows-based