Siemens SINUMERIK 840D sl Function Manual page 131

If vector v
angle of rotation α1 or α2 must also be set to zero. Otherwise, an alarm is produced. The alarm
is not output until the toolholder is activated, i.e. when the toolholder is changed.
Tool fine compensation combined with orientation
Tool fine compensations and toolholders cannot be combined. The activation of tool fine
compensation when a toolholder is active, and vice versa the activation of the toolholder when
tool fine compensation is active, produces an alarm.
Automatic toolholder selection, RESET
For RESET or at program start, a toolholder can be selected automatically via the machine data:
MD20126 $MC_TOOL_CARRIER_RESET_VALUE (Active toolholder at RESET)
It is handled similar to the controlled selection of a tool via the machine data:
MD20120 $MC_TOOL_RESET_VALUE (Tool length compensation Power up (RESET/TP-
End))
The behavior at RESET or at program start is controlled as in the case of tool selection via the
same bit 6 in the machine data:
MD20110 $MC_RESET_MODE_MASK (definition of initial control settings after RESET/TP-
End)
Or:
MD20112 $MC_START_MODE_MASK (definition of initial control system settings at NC-
START)
For further information, see Function Manual "Basic Functions", Section "Mode group, channel,
program operation, reset behavior".
SW 6.3 and higher
If TCOABS was active for the last selection before reset, the behavior is unchanged compared
to previous versions. A different active G code causes the toolholder with orientation capability
to be activated with the frame that was active before the last reset. Modified toolholder data
($TC_CARR...) are also considered. If these data are unchanged, the toolholder is activated in
exactly the same state as before reset. If the toolholder data were changed after the toolholder
selection before reset, selection corresponding to the last frame is not always possible. In this
case, the toolholder with orientation capability is selected according to the G-Code (group 42)
values valid at this time and the active frame.
MD22530 output of auxiliary functions to PLC
That, optionally, a constant or an M code is output when the toolholder is selected, whose
number of the code is derived from the toolholder number. Can be set with the machine data:
MD22530 $MC_TOCARR_CHANGE_M_CODE (M code at toolholder change)
For further information, see Function Manual "Basic Functions", Section "Mode group, channel,
program operation, reset behavior".
Tools
Function Manual, 06/2019, A5E47435126B AA
or v , which describes the direction of a rotary axis, is set to zero, the associated
1 2
2.8 Tool carriers with orientation capability
W1: Tool offset
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