HEIDENHAIN TNC 320 (340 55x-03) - Manual (Page 434)

434 10 Programming: Q-Parameters
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.12 Pr
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10.12 Preassigned Q Parameters
The Q parameters Q100 to Q122 are assigned values by the TNC. The
Q parameters are assigned:
„ 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 Parameter value
No tool axis defined Q109 = –1
X axis Q109 = 0
Y axis Q109 = 1
Z axis Q109 = 2
U axis Q109 = 6
V axis Q109 = 7
W axis Q109 = 8