Siemens SINUMERIK 840D sl Programming Manual page 587

Example
Limitations
In the example, the active software limit switches and working area limits in the X-Y plane and
the following three protection zones are displayed:
● C2: Tool-related, channel-specific protection zone, active, circular, radius = 2 mm
● C4: Workpiece-related, channel-specific protection zone, preactivated, square, side length
= 10 mm
● N3: Machine-specific protection zone, active, rectangular, side length = 10 mm x 15 mm
NC program
The protection zones and working area limits are defined first in the NC program. The
CALCPOSI() function is then called with different parameter assignments.
Program code
N10 DEF REAL _START[3]
N20 DEF REAL _DIST[3]
N30 DEF REAL _LIMIT[5]
N40 DEF REAL _MAXDIST[3]
N50 DEF INT _PA
N60 DEF INT _STATUS
NC programming
Programming Manual, 12/2019, 6FC5398-2EP40-0BA0
Work preparation
3.6 Protection zones
587