Mitsubishi 00JCPU User Manual

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2.2.2 Subroutine program
(1) Definition
Subroutine program is a program from a pointer (P ) to the RET instruction.
This program is executed only when it is called by a subroutine program call instruction (such as CALL(P),
FCALL(P)) from a main routine program.
(2) Application
• Programming a program which is executed two or more times in one scan as a subroutine program can
reduce the number of steps in the entire program.
• Programming a program which is executed only when a certain condition is satisfied as a subroutine
program can shorten the scan time.
(3) Programming of subroutine programs
Create subroutine programs between the FEND and END instructions in the main routine program.
*1: Since the Basic model QCPU cannot execute multiple programs, the file name is fixed to "MAIN".
*2: The pointer numbers do not need to be specified in ascending order.
Subroutine programs can be managed as one separate program (stand-by type program). ( Section 2.3.4)
Remark
Subroutine programs can be configured with the nesting. ( Section 9.8)
Figure 2.6 Programming location of subroutine programs
Program A
*1
P0
FEND
RET
RET
RET
END
Y10
Y11
Y12
P8
P1
Main routine
program
Subroutine
program
pointer
*2

Mitsubishi 00JCPU Specifications

General

Brand	Mitsubishi
Model	00JCPU
Category	Controller
Language	English