HEIDENHAIN TNC 640 (34059x-01) ISO programming - Manual (Page 221)

HEIDENHAIN TNC 640 221
8.1 Pr
inciple and Ov
erview
QS parameters (the S stands for string) are also available on the TNC
and enable you to process texts. In principle, the same ranges are
available for QS parameters as for Q parameters (see table above).
Programming notes
You can mix Q parameters and fixed numerical values within a
program.
Q parameters can be assigned numerical values between
-999 999 999 and +999 999 999. The input range is limited to 15 digits,
of which up to 9 may be before the decimal point. Internally the TNC
calculates numbers up to a value of 10
10
.
You can assign a maximum of 254 characters to QS parameters.
Freely usable QL parameters, only effective
locally (within a program). QL0 to QL499
Freely usable QR parameters that are nonvolatile,
i.e. they remain in effect even after a power
interruption. QR0 to QR499
Note that for the QS parameters the QS100 to QS199 range
is reserved for internal texts.
Local parameters QL are only effective within the
respective program, and are not applied as part of program
calls or macros.
Meaning Range
Some Q and QS parameters are always assigned the
same data by the TNC. For example, Q108 is always
assigned the current tool radius (see "Preassigned Q
Parameters", page 276).