Siemens SINUMERIK 840DE Programming Manual page 382

Special functions
9.1 Auxiliary function outputs
Notice
Extended address notation cannot be used for the functions marked with *.
The commands M0, M1, M2, M17 and M30 are always initiated after the traversing
movement.
Machine manufacturer
All free M function numbers can be assigned by the machine manufacturer, e.g., with
switching functions for controlling clamping fixtures or for activating/deactivating other
machine functions, etc.
See machine manufacturer's specifications.
Example
N10 S...
N20 X... M3
N180 M789 M1767 M100 M102 M376
Predefined M commands
Certain important M functions for program execution are supplied as standard with the
control:
Programmed stop, M0
Machining stops in the NC block with M0. You can now, for example, remove swarf,
remeasure, etc.
Programmed stop 1 - optional stop, M1
M1 can be set with
• HMI/dialog "Program Control" or
• the VDI interface.
Program execution on the NC is stopped at each of the programmed blocks.
Programmed stop 2 - an auxiliary function associated with M1 with stop in program
execution
Programmed halt 2 can be set via HMI/dialog "Program control" and permits technological
processes to be interrupted at any time when the part has finished machining. It therefore
allows the operator to intervene in the production process in order to remove chips, for
example.
9-6
;M function in the block with axis
movement, ;spindle accelerates before
the X axis ;movement
;Max. of 5 M functions in the block
Programming Manual, 10.2004 Edition, 6FC5 298-7AB00-0BP1
Fundamentals