External Storage Media - Data Transfer - Siemens SINUMERIK 828D Manual

2.4
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General information on workpiece production

2.4.2 External storage media - data transfer

NC programs are stored in the control, if required, downloaded to the working memory, and
executed on the machine.
Mold-making programs are often too large for the NC memory or they cannot be processed.
Therefore these are swapped to an external memory and processed successively. In the main
program, an EXTCALL command is programmed, which calls up the program according to the
network path on the server, the USB interface, hard drive, etc.
Procedure when calling the geometry program with EXTCALL/CALL
Program the geometry program call, e.g. SAMPLE in the main program. The call differs
depending on the control and where the data is stored.
Subprogram is on the HMI user memory (NC)
CALL "SAMPLE"
Subprogram is in the directory on the CompactFlash card
EXTCALL "CF_CARD:/PROGRAMS/SAMPLE.SPF"
Subprogram is on a local drive
EXTCALL "LOCAL_DRIVE:/PROGRAMS/SAMPLE.SPF"
Subprogram is on a USB stick
EXTCALL "USB:/MOLD_DIE/CAM_ROUGH.SPF"
Network connected with Ethernet and path in the machine data SD 42700, e.g. on a server
"//R4711/workpieces/subprograms". The default setting is optional. The directory can first
be specified when making the call with EXTCALL.
EXTCALL "SAMPLE.SPF"
Processing of USB flash drive / CF card
On the control, there is a USB port on the front, and on the SINUMERIK 828D, there is a USB
port on the front and on the rear. The slot for a CompactFlash card on the SINUMERIK 828D is
on the front.
Storage media can be inserted or removed during operation, i.e. the machine does not have
to be restarted in order for the storage medium to be recognized
Loading, editing and executing of part programs from the storage medium.
When executing part programs from a storage medium there is no loss of velocity (DNC
operation), in which case executing from a CF card is recommended.
No special software is necessary for reading from or writing to the storage medium on the
PC.
Direct execution from a USB FlashDrive is not recommended. Disconnecting during
operation will stop machining and, under certain circumstances, cause damage to the
workpiece.
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