Siemens SINUMERIK 840D sl Function Manual page 739

Boundary conditions
M and T functions for tool change in a block
If, in addition to the M function replacement with parameter transfer, a T function
replacement was configured, the following behavior is applicable in case of a conflict, i.e., T
and M function for tool change are in one block:
• The T function replacement does not take place. Instead, the T value is made available to
• The programming of the address T in the M function subroutine does not result in another
Basic logic functions: Mode group, channel, program operation, reset response (K1)
Function Manual, 11/2006, 6FC5397-0BP10-2BA0
the M function replacement via the appropriate $C_T... system variables.
replacement.
Note
Configuration of MD10718 $MN_M_NO_FCT_CYCLE_PAR:
The configuration of a replacement subroutine for the tool change with M code is
dependent on whether the tool change with M code was actually configured with
MD22550 $MC_TOOL_CHANGE_MODE.
2.11 Subroutine call through NC language replacement
Detailed description
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