5 PLC Programming Languages You Need to Know | Lesson 6 | PLC Fundamentals
Now that you know how the PLC "thinks" (the scan cycle), it’s time to learn how to speak its language. In this lesson, we explore the different ways engineers write instructions for industrial controllers.
While Ladder Logic is the most famous, modern automation often requires a mix of different styles. We will break down the international IEC 61131-3 standard, which defines the five core languages used globally. Whether you prefer visual diagrams or text-based coding, this lesson will show you which tool to use for the job.
⌨️ What You Will Master:
The History of Relay Logic: How physical wiring evolved into the Ladder Diagram (LD) we use today.
The IEC 61131-3 Standard: Understanding the global "rulebook" that ensures PLC programming remains consistent across different manufacturers.
The 5 Languages Overview: A quick look at the strengths of Ladder (LD), Function Block (FBD), Structured Text (ST), Sequential Function Chart (SFC), and Instruction List (IL).
Choosing the Right Language: When to use visual logic for troubleshooting vs. using text-based logic for complex math.
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