Example - Siemens SINUMERIK 840DE sl Function Manual

Persistent transformation
Machine data that are relevant for persistent transformations:
● MD20144 $MC_TRAFO_MODE_MASK
● MD20140 $MC_TRAFO_RESET_VALUE
● MD20110 $MC_RESET_MODE_MASK and
MD20112 $MC_START_MODE_MASK
Not transformation-specific
Machine data that are not transformation-specific. They are not uniquely assigned to a specific
transformation data set - or are also of significance outside an active transformation:
● MD21110 $MC_X_AXIS_IN_OLD_X_Z_PLANE
● MD21090 $MC_ MAX_LEAD_ANGLE
● MD21092 $MC_ MAX_TILT_ANGLE
● MD21100 $MC_ORIENTATION_IS_EULER
2.8.5

Example

It would be permissible in the following example to reconfigure (write) a machine data affecting
the second transformation (e.g. MD24650 $MC_TRAFO5_BASE_TOOL_2[2]) in block N90,
since writing a machine data alone does not activate it. However, if the program remained
otherwise unchanged, an alarm would occur in block N130, because an attempt would then be
made to modify an active transformation.
Example program:
Program code
N40 TRAORI(2)
N50 X0 Y0 Z0 F20000 T1 T1
N60 A50 B50
N70 A0 B0
N80 X10
N90 $MC_TRAFO5_BASE_TOOL_1[2] = 50
N100 A20
N110 X20
N120 X0
N130 NEWCONF
N140 TRAORI(1)
N150 G19 X0 Y0 Z0
N160 A50 B50
N170 A0 B0
N180 TRAFOOF
Transformations
Function Manual, 06/2019, A5E47435470B AA
2.8 Activating transformation machine data via part program/softkey
M1: Kinematics transformation
Comment
; Select 2nd orientation transformation
; Overwrite a machine data item of the
1st orientation transformation
; Accept new machine data
; Selection of the 1st orientation
transformation MD is effective
131