HEIDENHAIN TNC 320 (340 551-02) - Manual (Page 388)

388 10 Programming: Q Parameters
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.12 Pr
eassigned Q
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ar
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10.12 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 assigns values from the PLC to parameters Q100 to Q107 in
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
5th axis Q109 = 7
W axis Q109 = 8