A programmable controller, which is also referred to as a "programmable logic controller" or "PLC", is a control device used for industrial automation.

Until now, countries around the world have developed their economies by mass-producing and consuming products.
Mass production is achieved by using machinery.
The efficiency of the mass production is further increased by automating machine operations.
In this chapter, let's learn about sequence control, which is the basics of industrial automation.

• 1.1 Meaning of "Sequence"
• 1.2 Sequence Control
• 1.3 Application Examples of Sequence Control
• 1.4 Devices Required for Sequence Control
• 1.5 Basic Sequence Control