208
Note Register E0 is used as a loop counter in block N012 because loops can’t be
nested as shown below.
N005 G01 XA1000 YA1001 F20 M10
::
N008 G70 N004/L10
::
N012 G70 N004/L5
The loops in the example above won’t operate properly. A subprogram can also
be used for nesting, as shown in the following sample program.
Sample Program 2 N000 P008 XY
N001 G11
N002 G63 A1000=100
N003 G63 A1001=100
N004 G72 P700
N005 G63 A1000=100
N006 G60 A1001=A1001+30
N007 G70 N004/L4
N008 G79
Subprogram N000 P700 XY
N001 G01 XA1000 YA1001 F20 M10
N002 G01 X0 Y0 F50
N003 G60 A1000=A1000+20
N004 G70 N001/L9
N005 G73
Explanation Blocks N005 through N008 in sample program 1 have been converted to sub-
program format in subprogram P700, which is called from step N004 in main pro-
gram P008. Main program P008 and subprogram P700 have independent
loops, so they will operate properly.
Function G73 (SUBPROGRAM END) must be included at the end of subpro-
gram P700.
9-8 Stopping a Program with a General Input
This program shows how to stop MC program execution when general input 1
goes ON.
General input 1
Axis operation
Present value
Stopping a Program with a General Input
Section 9-8
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