Fifteen basic knowledge points that everyone who engages in automation PLC understands

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1. **Understanding the Basics**: At its core, a PLC is a digital computer used for automation of industrial processes. Think of it as the brain behind the machinery in factories and production lines. It’s designed to handle multiple inputs and outputs, making it the ideal choice for automating control processes.

2. **Components of a PLC**: Every PLC system generally comprises a power supply, a CPU (central processing unit), input and output modules, and a programming device. Knowing these components inside out is like knowing the ingredients of your favorite dish. You can’t cook up automation magic without them!

3. **Programming Languages**: PLCs can be programmed using a variety of languages. The most common ones are Ladder Logic, Functional Block Diagram (FBD), Structured Text (ST), Instruction List (IL), and Sequential Function Charts (SFC). Ladder Logic is the most widely used and is a great starting point for beginners.

4. **Inputs and Outputs (I/O)**: Inputs are the signals or data received by the system (like sensors), and outputs are the signals sent from the system to control devices (like motors). Understanding the I/O configuration is critical as it dictates how the PLC interacts with the real world.

5. **Scan Cycle**: The scan cycle is the sequence of operations a PLC goes through, typically including reading inputs, executing the control program, and updating outputs. This cycle happens incredibly fast, ensuring real-time control of processes.

6. **Timers and Counters**: These are essential functions within a PLC that help in creating delays (timers) or counting events (counters). They are like the stopwatch and tally counter in your automation toolbox.

7. **Networking**: PLCs often need to communicate with other PLCs, computers, or devices. Understanding networking protocols like Ethernet/IP, Profibus, and Modbus will help you design efficient and connected systems.