Siemens SINUMERIK 840D Operating Manual

Program management
13.11 EXTCALL
Milling
Operating Manual, 03/2010, 6FC5398-7CP20-1BA0
517
13.11 EXTCALL
The EXTCALL command can be used to access files on a local drive, USB data carriers or
network drives from a part program.
The programmer can set the source directory with the setting data SD $SC42700
EXT_PROG_PATH and then specify the file name of the subprogram to be loaded with the
EXTCALL command.
General conditions
The following supplementary conditions must be taken into account with EXTCALL calls:
● You can only call files with the MPF or SPF extension via EXTCALL from a network drive.
● The files and paths must comply with the NCK naming conventions (max. 25 characters
for the name, 3 characters for the identifier).
● A program is found on a network drive with the EXTCALL command if
– with SD $SC42700 EXT_PROG_PATH, the search path refers to the network drive or
a directory contained on the network drive. The program must be stored directly on
that level, no subdirectories are searched.
– without SD $SC42700: The correct location of the program is specified in the
EXTCALL call itself by means of a fully qualified path that can also point to a
subdirectory of the network drive.
Note
Maximum path length for EXTCALL
The path length must not exceed 112 characters. The path comprises the contents of
the setting data (SD $SC42700) and the path data for EXTCALL call from the part
program.
Examples of EXTCALL calls
The setting data can be used to perform a targeted search for the program.
● Call of USB drive on TCU (USB storage device on interface X203), if SD42700 is empty:
e.g. EXTCALL "//TCU/TCU1 /X203 ,1/TEST.SPF"
- OR -
Call of USB drive on TCU (USB storage device on interface X203), if SD42700
"//TCU/TCU1 /X203 ,1" contains: EXTCALL "TEST.SPF"
● Calls the USB front connection (USB FlashDrive), if SD $SC 42700 is empty: e.g.
EXTCALL "//ACTTCU/FRONT,1/TEST.SPF"
- OR -
Call of USB front connection (USB FlashDrive), if SD42700 "//ACTTCU/FRONT,1"
contains: EXTCALL "TEST.SPF"

Siemens SINUMERIK 840D Specifications

General

Series	SINUMERIK 840D
Axes	Up to 31
Channels	Up to 10
Operating System	Windows-based
Power Supply	24 V DC
Control Unit Type	CNC
Interface	Ethernet, PROFIBUS
Display	TFT color display
Interpolation	Spline
PLC	Integrated PLC
Data Storage	CompactFlash, USB