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The Complete Guide from
Beginner to Professional

Clear step-by-step explanations from basics to advanced.
Master the technology that drives factory automation!

PLC Sequence Control Course

Essential Basics

What Is Sequence Control?

Start your sequence control journey here — from relay circuits explained from scratch.

Elementary

Reading Ladder Diagrams

Clear explanations of how to read and write ladder diagrams

Intermediate

Learning About PLCs

From word device usage to circuit design fundamentals and ladder programming techniques

Advanced

Designing Ladder Diagrams

Learn how to design ladder diagrams — not just writing them, but how to think through the design process

Practice

Writing Ladder Diagrams in Practice

Use a simulator to run and learn ladder diagrams with hands-on practice

Reference Books

Recommended Books

Books and reference materials available in bookstores or online

Skills Test

Machinery Maintenance Skills Test

Explanations of pre-released past questions for the Skills Test — Electrical Maintenance category

Online Store

Learning Kits

Original learning kits produced by PLC Sequence Control Course — all digital content.

Column

Tips & Techniques

Tips and techniques introduced on YouTube and other platforms, presented with video

YOUTUBE

PLC Sequence Control Course Channel

Sequence control and ladder diagrams explained on YouTube. Please subscribe to our channel!

YouTube

Popular Articles in Japan

PLC Wiring Methods

Explains wiring methods for PLC. Covers how to connect sensors to input terminal blocks and loads to output terminal blocks in an easy-to-understand manner.

Ladder Diagram

The program written into the PLC. Ladder diagrams are the foundation of PLC programming.

CC-Link

A brief overview of CC-Link field network.

Thanks to the support of our readers, PLC Sequence Control Course has had the opportunity to publish a reference book. Just like this website, it is written to be easy to understand for beginners. We hope it will be a valuable resource for you.

Illustrated Introduction: Understanding the Latest Sequence Control and Circuit Diagrams [2nd Edition]

This Is All You Need! Sequence Control (Kindle Edition available)

Sequence Control Made Simple: How It Works (Illustrated Guide Series)

"This Is All You Need! Sequence Control" is available as a Kindle e-book. If you prefer a print edition, please select "Paperback" from the format options, or purchase from the top page.

Sequence control is an essential technology in industrial equipment, particularly in manufacturing. It is a control method that operates machinery according to a predetermined sequence, and the vast majority of industrial equipment relies on it. A control device that uses a dedicated microcomputer for sequence control is called a PLC, commonly known as a "sequencer." *"Sequencer" is a trade name for Mitsubishi Electric's PLC products.

※ This site "PLC Sequence Control Course" primarily uses Mitsubishi PLCs (sequencers) for its explanations.

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