Siemens SINUMERIK 840D sl Operating Manual page 257

NOTICE
Possible interruption when executing from USB FlashDrive
Direct execution from a USB-FlashDrive is not recommended.
There is no protection against contact problems, falling out, breakage through knocking or
unintentional removal of the USB-FlashDrive during operation.
Disconnecting it during operation will result in immediate stopping of the machining and,
thus, to the workpiece being damaged.
Universal
Operating Manual, 03/2013, 6FC5398-6AP40-3BA1
Software options
To display the "Local drive" softkey, you require the "Additional HMI user
memory on CF card of the NCU" option (not for SINUMERIK Operate on
PCU50 / PC).
Machine manufacturer
Processing EXTCALL calls can be enabled and disabled.
Please refer to the machine manufacturer's specifications.
Managing programs
9.14 EXTCALL
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