Siemens SINUMERIK 840D sl Function Manual page 516

Kinematic Transformation (M1)
7.3 TRACYL
TRACYL_ROT_SIGN_IS_PLUS_t
If the direction of rotation of the rotary axis on the x-y plane is counter-clockwise when
viewed against the z axis, then the machine data must be set to TRUE, otherwise to FALSE.
MD24810 $MC_TRACYL_ROT_SIGN_IS_PLUS_t=TRUE
In this case, "t" is substituted by the number of the TRACYLtransformations declared in the
transformation data blocks (t may not be greater than 2).
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
Note
If this machine data is set to one of the values 0 to 6, 17, 30, then no M code is output.
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.
516
Number of the M code that is output at the VDI interface in the case of transformation
changeover.
Function Manual, 01/2008, 6FC5397-1BP10-3BA0
Extended Functions