Main Program And Subprogram - Wuhan Huazhong Numerical Control Co., Ltd HNC-18iT v4.0 Programming Manual

- Format of end
The last block should contain M02 or M03 to indicate the end of program.
- Format of Comments
All information after the ";" is regarded as comments.
All information between "( )" is regarded as comments.
1.8.2 1.8.2 Main Main Program Program
1.8.2 1.8.2 Main Main Program Program and
There are two type of program: main program and subprogram. The CNC operates
according to the main program. When a execution command of subprogram is at the
execution line of the main program, the subprogram is called. When the execution of
subprogram is finished, the system returns control to the main program.
Follow the direction
ofthe subprogram
Note: Note:
Note: Note:
Main program and its subprogram must be written in a same file with a different program
codes.
end of of of of program end end program program program
Comments Comments Comments
and and Subprogram Subprogram
and Subprogram Subprogram
Main program
Instruction 1
Instruction 2
Instruction n
Instruction n+1
Figure 1.27 Main program and subprogram
Subprogram
Instruction 1
Instruction 2
Return to the main program
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1. General