HEIDENHAIN TNC 640 (34059x-02) ISO programming - Manual (Page 276)

Programming: Q Parameters
9.7 Additional functions
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TNC 640 | User's Manual for DIN/ISO Programming | 5/2013
D29: Transfer values to the PLC
The D29 function transfers up to eight numerical values or Q
parameters to the PLC.
Increments and units: 0.1 µm or 0.0001°
Example: Transfer the numerical value 10 (which means 1 µm or
0.001°) to the PLC
N56 D29 P01 +10 P02 +Q3
D37 EXPORT
You need the D37 function if you want to create your own cycles
and integrate them in the TNC. The Q parameters 0 to 99 are
effective only locally. This means that the Q parameters are
effective only in the program in which they were defined. With the
D37 function you can export locally effective Q parameters into
another (calling) program.
The TNC exports the value that the parameter has at
the time of the EXPORT command.
The parameter is exported only to the presently
calling program.
Example: The local Q parameter Q25 is exported
N56 D37 Q25
Example: The local Q parameters Q25 to Q30 are exported
N56 D37 Q25 - Q30