Siemens SINUMERIK 840D sl Function Manual page 533

Replaceable geometry axes
The PLC is informed when a geometry axis has been replaced using GEOAX( ) through the
optional output of an M code that can be set in machine data.
● MD22534 $MC_TRAFO_CHANGE_M_CODE
References:
/FB1/ Function Manual Basic Functions; Coordinate Systems, Axis Types, Axis
Configurations, Workpiece-related Actual-Value System, External Zero Offset (K2)
Position of tool zero
The position of the tool zero point in relation to the origin of the Cartesian coordinate system
is specified by machine data as described in the following paragraph.
TRACYL_BASE_TOOL_t
MD24820 $MC_TRACYL_BASE_TOOL_t
The above machine data is used to inform the control of the position of the tool zero point in
relation to the origin of the cylinder coordinate system declared for TRACYL. The machine
data has three components for the axes X, Y, Z of the machine coordinate system.
Figure 7-15
Extended Functions
Function Manual, 09/2009, 6FC5397-1BP20-0BA0
Number of the M code that is output at the VDI interface in the case of transformation
changeover.
Note
If this machine data is set to one of the values 0 to 6, 17, 30, then no M code is output.
Position of tool zero in relation to machine zero
M1: Kinematic transformation
7.3 TRACYL (option)
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