Siemens SINUMERIK 840D sl Programming Manual

3.23.4 Process DataShare - Output to an external device/file (EXTOPEN, WRITE,
EXTCLOSE):
The writing of data from a part program to an external device/file is performed in three steps:
1. Open the external device/file
The external device/file is opened for the channel for writing using the EXTOPEN command.
2. Writing data
The output data can be processed using the string functions of the NC language, e.g.
SPRINT. The WRITE command is used for writing.
3. Close the external device/file
The external device/file assigned in the channel is released again using the EXTCLOSE
command, when the end of the program is reached (M30) or for a channel reset.
Syntax
DEF INT <Result>
DEF STRING[<n>] <Output>
…
EXTOPEN(<Result>,<ExtDev>,<SyncMode>,<AccessMode>,<WriteMode>)
…
<Output>="data output"
WRITE(<Result>,<ExtDev>,<Output>)
…
EXTCLOSE(<Result>,<ExtDev>)
Work preparation
3.23 Additional functions
NC programming
Programming Manual, 12/2019, 6FC5398-2EP40-0BA0 997

Siemens SINUMERIK 840D sl Specifications

General

Control Type	CNC
Number of Axes	Up to 31
Max Number of Channels	10
Interfaces	Ethernet, PROFIBUS, PROFINET, USB
Interpolation	5-axis interpolation
Operating Temperature	0°C to 45°C
Relative Humidity	Up to 95% (non-condensing)
Display	TFT color display, various sizes
Programming Languages	DIN/ISO
Safety Features	Safety Integrated
PLC	Integrated PLC S7-300
Drive Interface	SINAMICS S120
Data Storage	CF card, USB
Operating System	Windows-based