HEIDENHAIN TNC 620 (340 56x-02) - Manual (Page 225)

HEIDENHAIN TNC 620 225
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, meaning that up to nine digits plus
the algebraic sign are permitted. You can set the decimal point at any
position. Internally, the TNC can calculate up to a range of 57 bits
before and 7 bits after the decimal point (32-bit data width
corresponds to a decimal value of 4 294 967 296).
You can assign a maximum of 254 characters to QS parameters.
Parameters that are primarily used for
call-active OEM cycles, globally effective for all
programs that are stored in the TNC memory Q1400 to Q1499
Parameters that are primarily used for
Def-active OEM cycles, globally effective for all
programs that are stored in the TNC memory Q1500 to Q1599
Freely applicable parameters, globally effective
for all programs stored in the TNC memory Q1600 to Q1999
Note that for the QS parameters the QS100 to QS199 range
is reserved for internal texts.
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 282).