Commissioning; General; Overview; Structure Of The System Variables - Siemens SINUMERIK 840D sl Function Manual

The coordinate system of the geometric data always has its origin at the point from which the
tool length offsets point to the tip of the tool.
System variable
All parameters for an automatic tool protection area can be read via System variable
(Page 232).
6.2

Commissioning

6.2.1

General

6.2.1.1

Overview

The commissioning of the "Collision avoidance" function is performed using:
● Machine data
– Specifications for the quantity structure of protection areas, protection area elements,
– Creation mode of the machine model
– Creation mode for automatic tool protection areas
● System variables
– Parameterization of the protection areas
– Parameterization of the protection area elements of a protection area
6.2.1.2

Structure of the system variables

The system variables are structured according to the following scheme:
● $NP_<name>[<index_1>]
● $NP_<name>[<index_1>, <index_2>]
General
The system variables to describe the protection areas or protection area elements have the
following properties:
● Prefix: $NP_, (N for NC, P for protection).
● They can be read and written via NC programs.
● They can be stored in archives and loaded to the NC again.
Special functions
Function Manual, 01/2015, 6FC5397-2BP40-5BA2
NC/PLC interface signals, triangles for the geometry modelling
K8: Geometric machine modeling - only 840D sl
6.2 Commissioning
217