Siemens SINUMERIK 840D sl Commissioning Manual page 862

Service and diagnostics
3.2 Backup license
3.2.1 This is how you backup the license key
Backing up the license key on a USB storage medium
Procedure:
1. In the main menu, select the menu item "Backup NCU Software and Data".
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The following menu is displayed:
Figure 3-3 Backing up licenses
Commissioning Manual, 03/2013, 6FC5397-1DP40-3BA1
NCU operating system (IM7)