Siemens SINUMERIK 840D sl Function Manual page 1911

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 $MC_START_MODE_MASK (definition of initial control system settings at NC-
START)
References:
/FB1/ Function Manual Basic Functions; Mode Group, Channel, Program Operation, Reset
Response (K1)
SW 6.3 and higher
If TCOABS was active for the last selection before reset, the behavior is unchanged
compared to previous versions. A different active G code causes the toolholder with
orientation capability to be activated with the frame that was active before the last reset.
Modified toolholder data ($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)
References:
/FB1/ Function Manual Basic Functions; Output of Auxiliary Functions to PLC (H2)
Basic logic functions: Tool Offset (W1)
Function Manual, 11/2006, 6FC5397-0BP10-2BA0
Detailed Description
2.5 Toolholder with orientation capability
123