HEIDENHAIN iTNC 530 (340 49x-04) - Manual (Page 597)

HEIDENHAIN iTNC 530 597
1
1
.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).
Note that for the QS parameters the QS100 to QS199 range
is reserved for internal texts.
Some Q 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 646).
If you are using the parameters Q60 to Q99 in encoded
OEM cycles, use MP7251 to define whether the
parameters are only to be used locally in the OEM cycles
(.CYC file), or can be used globally for all programs.
With MP7300 you specify whether the TNC should reset
Q parameters at the end of the program, or if the values
should be saved. Make sure that this setting does not
have any effect on your Q-parameter programs!