HEIDENHAIN TNC 620 (81760x-02) ISO programming - Manual (Page 290)

Programming: Q parameters
9.1 Principle and overview of functions
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TNC 620 | User's ManualDIN/ISO Programming | 2/2015
9.1 Principle and overview of functions
With parameters you can program entire families of parts in a
single part program, by programming variable parameters instead
of fixed numerical values.
Use parameters for e.g.:
Coordinate values
Feed rates
Spindle speeds
Cycle data
With parameters you can also:
Program contours that are defined through mathematical
functions
Make execution of machining steps depend on certain logical
conditions
Parameters are always identified with letters and numbers. The
letters determine the type of parameter and the numbers the
parameter range.
See the table below for detailed information:
Parameter type Parameter range Meaning
Q parameters: Parameters effect all programs in the TNC memory
0 - 30 Parameters for HEIDENHAIN cycles
31 - 99 Parameters for users
100 - 199 Parameters for special TNC functions
200 - 1199 Parameters for HEIDENHAIN cycles
1200 - 1399 Parameters for cycles of machine tool builder or third party provider
1400 - 1499 Parameters for CALL-active cycles of machine tool builder or third
party provider
1500 - 1599 Parameters for DEF-active cycles of machine tool builder or third party
provider
1600 - 1999 Parameters for
users
QL parameters Parameters only effective locally within a program
0 - 499 Parameters for users
QR
parameters
Parameters that are nonvolatile on all programs in the TNC
memory, i.e. they remain in effect even after a power interruption
0 - 499 Parameters for
users