Preassigned Q Parameters - HEIDENHAIN TNC 426 B User Manual

10.10 Preassigned Q Parameters

The Q parameters Q100 to Q122 are assigned values by the TNC.
These values include:
Values from the PLC
Tool and spindle data
Data on operating status, etc.
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.
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 TOOL DEF block)
Delta value DR from the tool table
Delta value DR from the TOOL CALL block
Tool axis: Q109
The value of Q109 depends on the current tool axis:
Tool axis
No tool axis defined
X axis
Y axis
Z axis
U axis
V axis
W axis
Spindle status: Q110
The value of Q110 depends on which M function was last
programmed for the spindle:
M function
No spindle status defined
M03: Spindle ON, clockwise
M04: Spindle ON, counterclockwise
M05 after M03
M05 after M04
Coolant on/off: Q111
M function
M08: Coolant ON
M09: Coolant OFF
HEIDENHAIN TNC 426 B, TNC 430
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Parameter value
Q109 = –1
Q109 = 0
Q109 = 1
Q109 = 2
Q109 = 6
Q109 = 7
Q109 = 8
Parameter value
Q110 = –1
Q110 = 0
Q110 = 1
Q110 = 2
Q110 = 3
Parameter value
Q111 = 1
Q111 = 0
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