When using PLCs, you will encounter many communication protocols and communication interfaces. 01 What Is Serial Communication? A serial port is a very common device communication protocol on computers (do not confuse it with Universal Serial Bus or USB). Most computers have two RS232-based serial ports. The serial port is also a common communication protocol … Read more
Weight is an important unit in life, and it is even more crucial in industry. How many kilograms of raw materials were added in the production process? How many kilograms of waste were generated, and so on… These data are essential elements supporting the smooth operation of the entire factory. So how do we measure … Read more
When people talk about the industrial Internet, they often discuss PLCs in the industrial field. However, most people seem to have an understanding of PLCs that dates back 20 years—Is PLC just logic control? In fact, it hasn’t been like that for 20 years. The Form of Controllers Has Changed Yes, today’s automation industry, both … Read more
Introduction The Internet of Things (IoT) is a tangible “physical” entity; automatic meter reading, automatic recharge payment, and peak-shifting billing are among the most successful IoT applications in China, widely recognized by the public. However, many people are still unclear about what Industrial IoT is and how it differs from IoT. For B2B manufacturing, as … Read more
Abstract PLC (Programmable Logic Controller) is a fundamental control device in critical infrastructure, and its security is crucial for the stable operation of the entire control system. However, with the deepening integration of information technology and industrialization, as well as the advancement of Industry 4.0, the information security issues of industrial control systems have become … Read more
In the previous article, we conducted a simple analysis of firmware. In this article, we will supplement some knowledge of Vxworks and continue our research into firmware content. As this involves operating system content, it is recommended that readers have a basic understanding of operating systems before reading this article, or refer to my article … Read more
Teacher Liao Changchu A university teacher told me: “Recently, while reviewing students’ graduation theses, I found that some students drew flowcharts for PLC programs just like microcontroller programs. However, when the system has analog control links, the flowcharts drawn are difficult to explain the issues, making it hard to create a comprehensive flowchart that reflects … Read more
Since the introduction of PLCs in the 1960s in the United States to replace traditional relay control devices, PLCs have rapidly developed and been widely applied around the world. At the same time, the functions of PLCs have continuously improved. With the ongoing advancements in computer technology, signal processing technology, control technology, and network technology, … Read more
Click the blue text to follow us Today, we will analyze a classic microcontroller power supply circuit. The circuit schematic is shown in the figure below: ▲ Simplified switch circuit Before powering the circuit, the switch “TEST” is open, and the microcontroller is not powered through VCC. At this time, the base of T1 is … Read more
Differences Between PLC and Microcontroller 99% of Electricians Have Saved This Mid Year Summary Many beginners often confuse PLCs and microcontrollers. Today, let’s discuss what the differences are: PART 01 What is PLC PLC is short for Programmable Logic Controller. It is a digital electronic device with a microprocessor, equivalent to a small computer, used … Read more