Siemens SINUMERIK 840D sl Programming Manual page 114

Subroutines, Macros
2.14 Execute external subroutine (EXTCALL)
Execution from external program saving
There are differences between how an external program is reloaded from an available
memory. These depend on the HMI operating panel used. The following memory variants
are available for SINUMERIK powerline and solution line systems:
• Process network drive as additional memory for HMI Embedded and Advanced.
• Process hard disk as option only for HMI Advanced powerline and solution.
• Process ATA card or via V.24 interface especially for HMI Embedded powerline.
• Process CompactFlash Card or USB drive for HMI solution line systems.
Programs to be reloaded can be saved with the existing option both on a network drive and a
CompactFlash card. An external user memory connected to the TCU is only fully supported
via USB interface X203. We cannot recommend using a USB FlashDrive as a persistent
memory.
Please note the relevant operating processes in the corresponding instructions.
References
/BEM/ HMI Embedded powerline or solution line
/BAD/ HMI Advanced powerline or solution line
Adjustable load memory (FIFO buffer)
A load memory is required in the NCK in order to process a program in "Execution from
external" mode (main program or subroutine). The size of the reload memory is preset to
30 Kbytes and like all other memory-related machine data, can only be changed to match
requirements by the machine manufacturer.
One reload buffer must be set for each program (main program or subroutine) to run
concurrently in "Processing from external source" mode.
Machine manufacturer
Please contact the machine manufacturer if the size and number of reloading buffers is to be
extended. For further information about "Processing from external source", see /FB1/
Function Manual, Basic Functions; BAG, Channel, Program Operation Mode (K1).
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Programming Manual, 03/2006 Edition, 6FC5398-2BP10-1BA0
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