Siemens SINUMERIK 840D sl Function Manual page 622

M5: Measuring
8.4 Setting zeros, workpiece measuring and tool measuring
The data management frames are read and a new frame set up for the corresponding values
in the variables.
Note
If variables are not set, the active frames are retained.
Values should only be written to those variables whose data management frames are to be
included in the new frame chain. In the case of the basic frames, only all of the frames can
be exchanged, and not just a particular frame. Active changes via $P_NCBFRMASK and
$P_CHBFRMASK are ignored.
Array variable for workpiece and tool measurement
The following array variable of length n is used for further input parameters that are used in
the various measurement types
Type
REAL
The control action of the measurement input parameters is described with the measuring
methods.
Selection of tool or cutting edge
The tool and edge number of the active tool must correspond to the selected tool. When T0,
D0 is selected, the active tool is calculated. If no tool is active, the tool selected by T, D is
calculated. No tool other than the selected tool may be active.
Type
INT
INT
Measurements with 3D probe
When measuring with the 3D probe, the radius of the tool is already compensated with
reference to the measuring point, and therefore the radius does not have to be included
when calculating the various measurement operations. This property can be defined by
means of the following variable:
Type
INT
622
System variable
$AC_MEAS_INPUT[n]
System variable
$AC_MEAS_T_NUMBER
$AC_MEAS_D_NUMBER
System variable
$AC_MEAS_TOOL_MASK
Description
Measurement input
parameters
Description
Selected tool
Selected cutting edge
Description
Tool position
Function Manual, 09/2009, 6FC5397-1BP20-0BA0
Values
n = 0 ... 9
Extended Functions