Mitsubishi MELSEC-A Series Programming Manual page 193

Type acpu/qcpu-a (a mode)

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Table of Contents

6. BASIC INSTRUCTIONS

Program Examples

The following programs are used with the A3CPU and other types of CPUs to output

pulses in accordance with the input condition of the PLS instruction while alternately

running the main and subprograms.

(1) For A3CPU

It is necessary to compare the operation result of a scan with that of the

previous scan to allow correct output of the PLS instruction. M9050 must

therefore be turned ON when the CHG instruction is executed to save the

operation result of the previous scan, which has been stored in the operation

result storage memory, in the save area.

Since the CHG instruction for the A3CPU is executed only when input conditions

are turned ON, programs must be written in the forms shown below.

Main sequence program

(2) For A3N, A73 and A3V CPUs

Since the CHG instruction for the A3NCPU is executed only when input

conditions are turned ON, programs must be written in the forms shown below.

Main sequence program

Sub sequence program

Sub sequence program

Acpu-common-p-e 13j741 Acpu Qcpu-a