Siemens SINUMERIK 840D sl Function Manual page 683

The following output variables are written for measurement type 11:
Output variable
$AC_MEAS_TOOL_DIAMETER
8.4.5.3 Measurement of tool lengths with zoom-in function (measurement type 22)
Tool length with zoom-in function
Tool length measurement with zoom-in function ($AC_MEAS_TYPE = 22)
If a zoom-in function is available on the machine, it can be used to determine the tool
dimensions.
Figure 8-23
The values of the following variables are evaluated for measurement type 22:
Input variable
$AC_MEAS_VALID
$AA_MEAS_POINT1[axis]
$AC_MEAS_P1_COORD
$AA_MEAS_SETPOINT[axis]
$AC_MEAS_SET_COORD
$AC_MEAS_ACT_PLANE
$AC_MEAS_FRAME_SELECT
$AC_MEAS_T_NUMBER
$AC_MEAS_D_NUMBER
$AC_MEAS_TYPE
* optional
Extended Functions
Function Manual, 03/2009, 6FC5397-1BP10-4BA0
Meaning
Tool diameter
Measurement of tool lengths with zoom-in function
Description
Validity bits for input variables
Measuring point 1 for all channel axes
Coordinate system of the measuring point *
Zoom positions x and z must be specified
Coordinate system of setpoint *
Calculated as active plane unless otherwise specified *
Calculated as additive frame unless otherwise specified *
Calculated as active T unless otherwise specified (T0) *
Calculated as active D unless otherwise specified (D0) *
22
Setting zeros, workpiece measuring and tool measuring
Measurement (M5)
683