PLC Programming: Basics and Languages

This lecture covers the basics of Programmable Logic Controllers (PLCs), including the main components such as the CPU, digital and analog inputs/outputs, and communication interfaces. It delves into PLC programming languages like Ladder Diagram (LAD), Instruction List (IL), Structured Text (ST), and Sequential Function Chart (SFC). The instructor explains the importance of the IEC 61131-3 standard, the evolution of PLC programming, and the limitations of IEC 61131. Practical exercises and examples are provided to illustrate the concepts, such as creating asymmetric sawtooth waves and writing code in different languages. The lecture also discusses the advantages of using PLCs over traditional relay logic and the challenges of using high-level languages like Java or Python for PLC programming.