Address Symbols

An instruction word is composed of address symbol(s) and numeral data with or without symbol.

Address symbols contained in CNC program block and their description are illustrated as follows:

Address Symbol	Description	B (Basic Function)	O (Optional Function)
D	Tool radius offset	•	•
F	Feedrate	•
G	Preparatory commands	•	•
H	Tool length offset	•
I	X-axis coordinate of arc center	•	•
J	Y-axis coordinate of arc center	•	•
K	Z-axis coordinate of arc center	•
L	Repeated No.	•	•
M	Miscellaneous Function	•
N	Sequence No.	•
O	Program No.	•
P	Delay in subprogram, which is set by sequence No. and program No.	•
Q	Depth of peck in fixed cycles		•
R	Retract point in fixed cycles/arc radius designation	•	•
S	Spindle speed function	•
T	Tool function	•
X	X-axis coordinate	•
Y	Y-axis coordinate	•
Z	Z-axis coordinate	•