HEIDENHAIN iTNC 530 (340 49x-04) ISO programming - Manual (Page 527)

HEIDENHAIN iTNC 530 527
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1
.1 Pr
inciple and Ov
erview
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.
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 558.
If you are using the parameters Q60 to Q99 in encoded
OEM cycles, define via MP7251 whether the parameters
are only to be used locally in the OEM cycles, or may be
used globally.
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!