HEIDENHAIN iTNC 530 HSCI Technical Manual page 1715

July 2013
Q parameters Effectiveness/Meaning
Q1500 to Q1599 Reserved for OEM cycles (DEF-active)
Parameters that are primarily used for DEF-active
OEM cycles, globally effective for all programs that
are stored in the TNC memory
Q1600 to Q1999 Freely applicable parameters, globally effective for all
programs stored in the TNC memory
QL0 to QL499 Freely usable QL parameters, only effective locally
(within a program)
QR0 to QR499 Freely usable QR parameters that are nonvolatile, i.e.
they remain in effect even after a power interruption
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).
Note
Some Q and QS parameters are always assigned the same data by the

TNC. For example, Q108 is always assigned the current tool radius
(please also note the list of preassigned Q parameters).
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 (.CYC file), 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 Q-parameter programs!
Note that for the QS parameters the QS100 to QS199 range is reserved

for internal texts.
MP7251 Number of global Q parameters starting from Q99 (up to
Q60) that are transferred from the OEM cycle to the calling
program.
Input: 0 to 40
9.5 Data Transfer NC > PLC, PLC > NC
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