Tool Change With T Functions (T Function); Additional Function (M Function) - Siemens SINUMERIK 808D Programming And Operating Manual

3.3.5.3

Tool change with T functions (T function)

There is a direct tool change when the T word is programmed.
The effect of the T function is defined via the machine data. See machine manufacturer's configuration.
3.3.5.4

Additional function (M function)

The M functions initiate switching operations, such as "Coolant ON/OFF" and other functions on the machine. Various M
functions have already been assigned a fixed functionality by the CNC manufacturer (see the following section).
Programming
M... Possible values: 0 to 9999 9999 (maximum INT value), integer
All free M function numbers can be assigned by the machine manufacturer, e.g. for switching functions to control the
clamping devices or for switching on/off of further machine functions. See data of the machine manufacturer.
The NC-specific M functions are described below.
M functions to stop operations (M00, M01, M02, M30)
A program stop is triggered with this M function and the machining is interrupted or ended. Whether the spindle is also
stopped depends on the specification of the machine manufacturer. Details are available in the documentation of your
machine manufacturer.
M00 (program stop)
The machining is stopped in the NC block with M00. One can now, e.g., remove chips, re-measure, etc. A signal is output to
the PLC. The program can be continued with the following key:
M01 (optional stop)
M01 can be set via the following methods:
● HMI/dialog box "Program control" or the
● VDI interface
The program processing of the NC is maintained with M01 only if the corresponding signal of the VDI interface is set or
"Program control" was selected in the HMI/dialog box.
M30 or M02 (end of program)
A program is ended with M30 or M02.
Note
A signal is output to the PLC with M00, M01, M02 or M30.
Note
Data on whether spindle is stopped with the commands M00, M01, M02 or M30 or the coolant supply is interrupted is
available in the documentation of your machine manufacturer.
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Programming and Operating Manual (ISO Turning/Milling)
01/2017