Mitsubishi Electric melsec q03ud(E)cpu - Structured Programming

CHAPTER1 OVERVIEW
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1.3 Structured Programming
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1.3 Structured Programming
The programs to be executed in the CPU module can be structured in the following two ways.
• In one program
• By dividing into multiple files
(1) Structuring in one program
Structured programming is available by creating one program as a collection of three program sections: main
routine program ( Section 2.2.1), subroutine program ( Section 2.2.2), and interrupt program
( Section 2.2.3).
Figure 1.4 Structuring in one program
P8
RET
RET
Y10
Y11
Y12
P1
END
FEND
CALL P1
IRET
I0
Main routine
program
Subroutine
program 1
Subroutine
program 2
Interrupt program