I am Lao Wang, and I have been working in automation maintenance for 12 years in a factory. Today, I will show you how to use PLC to create something advanced—a vibration analysis early warning system. Although this sounds like a task for precision instruments, it can be effectively managed with a PLC. Last year, … Read more
Do you remember that project that kept me awake all night? A packaging production line, with the client pushing hard for results. I thought to myself, this is just a simple conveyor control, I can jump right in and write the program. But what happened? I spent three whole days debugging, with problems popping up … Read more
On the grand stage of modern industrial production, various automation devices resemble precision instruments, collectively playing a symphony of efficiency, accuracy, and safety. Core devices such as PLCs, sensors, encoders, inverters, and relays not only perform unique roles but also collaborate closely to ensure the smooth operation of the entire production process. Next, let us … Read more
Digital Twin technology, as one of the core technologies of the Industry 4.0 era, is profoundly changing the equipment debugging and operation and maintenance models in traditional manufacturing. For PLC engineers, Digital Twin technology provides a powerful tool that combines virtual and real environments, allowing them to complete debugging work in a virtual environment before … Read more
This depends on the specific model of the PLC. PLCs can be categorized into relay output, transistor output, and thyristor output. Relay-type PLCs can directly control contactors, while transistor and thyristor-type PLCs cannot directly control contactors. The maximum output current of relay-type PLCs is 2A, which can drive AC and DC loads. The allowable load … Read more
I still remember that hot summer three years ago when I received what seemed like a simple project—designing a constant pressure water supply system for an industrial park. At that time, I thought, isn’t it just a variable frequency drive paired with a few water pumps? Little did I know that this would take three … Read more
> At seven in the morning, the city awakens from its slumber. The traffic at the intersection flows like blood, and the traffic lights act as the “heart valves” controlling the flow. Have you ever wondered: why does the green light always turn red just after the vehicles pass? Why is there a continuous green … Read more
Wiring Diagrams and Ladder Diagrams of Common PLC Control Circuits Screenshots of Electronic Books in the Resource Collection [Complete Set of Hardware Learning Materials]
I still remember 15 years ago when I first stepped into that roaring chemical factory workshop, facing walls full of control cabinets and dense ladder diagrams, feeling completely lost. An experienced worker threw me a piece of advice: “Kid, if you want to learn PLC, first digest these few books!” At that time, I had … Read more
The International Electrotechnical Commission (IEC) standard IEC 61131-3 defines five main PLC programming languages, each suitable for different types of control tasks and program complexities. Below is a detailed analysis of how PLC multilingual programming adapts to complex programs. 1. The Five Programming Languages Defined by IEC 61131-3 1. Ladder Diagram (LD) • Characteristics: A … Read more