Preassigned Q Parameters - HEIDENHAIN iTNC 530 User Manual

9.10 Preassigned Q Parameters

The Q parameters Q100 to Q199 are assigned values by the TNC. The
following are assigned to Q parameters:
Values from the PLC
Tool and spindle data
Data on operating status
Results of measurements from touch probe cycles etc.
Do not use preassigned Q parameters (or QS parameters)
between Q100 and Q199 (QS100 and QS199) as calculation
parameters in NC programs. Otherwise you might receive
undesired results.
Values from the PLC: Q100 to Q107
The TNC uses the parameters Q100 to Q107 to transfer values from
the PLC to an NC program.
WMAT block: QS100
The TNC saves the material defined in the WMAT block in parameter
QS100.
Active tool radius: Q108
The active value of the tool radius is assigned to Q108. Q108 is
calculated from:
Tool radius R (tool table or G99 block)
Delta value DR from the tool table
Delta value DR from the T block
The TNC remembers the current tool radius even if the
power is interrupted.
308 Programming: Q-Parameters