Siemens SINUMERIK 840D sl Function Manual page 717

2.9.7 Execution from external
Function
The "Execution from external" function can be used to execute programs that cannot be
saved directly in the NC memory due to memory shortage from an external program
memory.
External program memory
Depending on the system (SINUMERIK solution line/powerline), the available user interface
(HMI sl/HMI Advanced/HMI Embedded) and the acquired options, external program
memories may be stored on the following data carriers:
• CompactFlash card
• USB drive
• Network drive
• Local hard disk
Basic logic functions: Mode group, channel, program operation, reset response (K1)
Function Manual, 11/2006, 6FC5397-0BP10-2BA0
Note
Execution from external source via USB interface with SINUMERIK solution line
If external programs are to be transferred from an external USB drive via a USB interface,
only the interface via X203 (named "TCU_1") can be used.
A USB FlashDrive cannot be recommended as a persistent storage medium.
Note
Execution from external source via RS-232 interface with SINUMERIK powerline
In HMI Embedded, the "Execution from external source" softkey can be used to transfer
external programs across the RS-232 interface onto the NC.
Detailed description
2.9 Program control
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