Siemens SINUMERIK 840D sl Programming Manual

Indexing
The index of a system variable of type "Array of …" can in turn be a system variable. The index
is also evaluated in the main run in the interpolator clock cycle.
Example
Program code
... WHEN … DO $AC_PARAM[$AC_MARKER[1]]=3
Restrictions
● It is not permissible to nest indices with further system variables.
● The index must not be formed via preprocessing variables. The following example is
therefore not permitted since $P_EP is a preprocessing variable:
$AC_PARAM[ 1 ] = $P_EP[ $AC_MARKER[ 0 ] ]
See also
Arithmetic functions (Page 440)
Instructions (Page 440)
Fundamentals
2.15 Other information
NC programming
388 Programming Manual, 12/2019, 6FC5398-2EP40-0BA0

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