Contents
PLC Handbook
Chapter 1 - What is a PLC
Chapter 2 - History of the PLC
Chapter 3 - How to Choose a Controller
Chapter 4 - PLC Hardware
Collection of PLC Application Stories
Chapter - 6 Practical PLC Topics
6-1 Methods Behind PID Loop Control
6-2 PLC Communication - Coming of Age
6-3 EtherNet/IP: Implicit vs. Explicit Messaging
6-4 Motion Control Explained
Chapter - 5 PLC Software
5-1 Understanding Ladder Logic
5-2 Basic Instructions in Ladder Logic
5-3 Ladder Logic in Action
What is a PLC…
Programmable Logic Controllers (PLC) are often defined as miniature industrial computers that contain hardware and software used to perform control functions. More specifically, a PLC would be used for the automation of industrial electromechanical processes, such as control of machinery on factory assembly lines, amusement rides, or food processing. They are designed for multiple arrangements of digital and analog inputs and outputs with extended temperature ranges, immunity to electrical noise, and resistance to vibration and impact. A PLC will consist of two basic sections: the central processing unit (CPU) and the Input/Output (I/O) interface system
The PLC Handbook: A Practical Guide to Programmable Logic Controllers is a comprehensive resource designed for both beginners and experienced professionals working with programmable logic controllers (PLCs). PLCs are specialized digital computers used in automation for managing machinery and industrial processes, and they play a critical role in manufacturing, energy production, and many other fields.
Here are some highlights of the typical contents and benefits of a PLC handbook:
1. Foundational Knowledge
- The handbook usually begins with an introduction to PLCs, explaining their purpose, history, and importance in automation. It covers fundamental concepts such as input/output (I/O) modules, programming basics, and how PLCs interact with different components in an automated system.
- Understanding PLC hardware and software basics helps readers grasp the core components of PLC systems, such as processors, memory types, and power supplies.
2. Programming Techniques
- The PLC handbook often provides an overview of essential programming languages, such as Ladder Logic, Functional Block Diagram (FBD), Structured Text, and Sequential Function Charts (SFC).
- Practical programming examples and exercises are included, making it easier to understand logic development, sequencing, timing, and other aspects of PLC programming.
3. Application and Troubleshooting
- Real-world examples are presented to show how PLCs are used in various industries, including manufacturing, transportation, and utilities. Case studies often illustrate common automation problems and PLC-based solutions.
- Troubleshooting techniques are provided to help users identify and resolve issues within PLC systems. This section usually covers fault diagnosis, maintenance strategies, and error correction.
4. Advanced Topics
- Advanced sections may explore complex functions like data handling, communication protocols (such as Ethernet/IP and Modbus), Human-Machine Interface (HMI) integration, and cybersecurity measures.
- These chapters help readers who already understand basic PLC operations to expand their skills and apply them to more sophisticated and interconnected automation systems.
5. Hands-On Practice
- Many handbooks encourage practical application by including sample projects, hands-on activities, and practice problems. Some may even come with access to simulation software, allowing users to program virtual PLCs and see how changes affect system operation without needing physical hardware.
6. Industry Standards and Safety
- Information on industry standards (such as IEC 61131-3) and safety regulations helps users understand best practices and compliance requirements in the use of PLCs. This knowledge is essential for ensuring that systems are safe, reliable, and efficient.
Benefits of Using the PLC Handbook
- Enhanced Understanding: For beginners, the handbook demystifies the world of PLCs, breaking down complex concepts into understandable sections.
- Skill Development: The handbook offers a step-by-step guide to learning PLC programming, making it easier to build practical skills.
- Efficient Troubleshooting: With dedicated sections on diagnostics, users gain confidence in resolving issues, reducing downtime in automated systems.
- Career Advancement: Gaining in-depth PLC knowledge can lead to career growth, as industries highly value skilled automation professionals.
The PLC Handbook serves as a reliable guide for anyone looking to understand, apply, or deepen their knowledge of PLC systems. It supports both practical learning and theoretical understanding, making it an essential resource in industrial automation.
