Introduction; Programming Language In Plcs; Types Of Programming Languages - Mitsubishi Electric FX3G SERIES Programming Manual

Programmable controllers

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Table of Contents

Series Programmable Controllers

Programming Manual - Basic & Applied Instruction Edition

Introduction

This chapter explains basic items related to programming in FX

This section explains the features of programming in FX

1. List programming

This method is the basis of programs.

In this method, sequence instructions are input in the form of instruction words such as "LD", "AND" and "OUT".

This input method is the basis of sequence programs.

2) Example of list display

2. Circuit programming

In this method, ladder formats are drawn on the graphic screen.

In a circuit program, a sequence circuit is drawn on the graphic screen by sequence formats and device numbers.

Because a sequence circuit is expressed with contact symbols and coil symbols, the contents of a program can

be understood easily.

In the circuit display status, the PLC operations can be monitored.

Example of circuit display

The above list program is expressed in

the circuit diagram.

3. SFC (STL <step ladder>) programming

This input method allows sequence design in accordance with the flow of machine operations.

In an SFC (sequential function chart) program, sequences can be designed in accordance with the flow of

machine operations.

Compatibility between SFC programs and other programs

SFC programs can be converted into another program format. And when list programs and circuit programs are

created according to certain rules, they can be converted inversely into SFC programs.

PLCs support the following six types of programming languages:

1.1 Programming Language in PLCs

programmable controllers (PLCs).

Device number

1 Introduction

Fx3u series Fx3uc series