At the end of this article, there are 55 practical case materials. Introduction: In automated equipment, weight sensors are often used to detect whether materials are qualified. If qualified, they are packaged; if not, they are rejected. The weight sensor typically provides an analog signal to the PLC, which then evaluates the signal to determine … Read more
In the vast world of PLC (Programmable Logic Controller), three major schools stand tall, each showcasing its distinct characteristics, technical advantages, and application expertise, collectively driving technological progress and development in the field of industrial automation. These three schools—the American school, the European school, and the Japanese school—each have their unique features and strengths. American … Read more
Original work in Automation and Engineering Technology. On June 26, 2025, the Guangxi Hongwang 1550 acid-pickling mill combined unit, utilizing the Baoxin large PLC control system, was successfully commissioned. This project is located in the Fangchenggang Economic and Technological Development Zone, Fangchenggang City, with a construction scale of an annual production capacity of 1.5 million … Read more
Last night, I stayed in the workshop until 2 AM, not because of equipment failure, but while debugging a new energy-saving control algorithm. Watching the numbers on the energy consumption monitoring screen gradually decrease gave me a sense of accomplishment that was more invigorating than three cups of coffee. After so many years in automation, … Read more
A good PLC program typically needs to possess the following characteristics: simplicity, readability, correctness, reliability, ease of modification, extensibility, a complete alarm system, and convenient program simulation. Although these characteristics may manifest differently across various industries and processes, their core ideas remain the same. Today, we will discuss PLC programming standards! 1. Simplicity Make the … Read more
Follow me as we analyze 100 Mitsubishi PLC program cases. In the fascinating world of automation control, the Mitsubishi PLC acts like a precise commander, methodically orchestrating the operation of various devices. Today, let’s discuss an interesting application of the Mitsubishi PLC control system — the start-stop control with dual stop buttons, and see how … Read more
(1) Basic Instructions 1. Bit Logic Instructions Normally Open Contact ( -||- ): This instruction detects the input signal; the button is off when not pressed and turns on when pressed. For example, in the logic controlling the machine operation with the start button, pressing the start button closes the normally open contact, and the … Read more
In the field of industrial automation, the PLC (Programmable Logic Controller) is known as the “smart brain” of the equipment, controlling the orderly operation of the entire production process. However, when the indicator light on the PLC panel suddenly lights up, it often indicates that the system has encountered a problem, causing many engineers to … Read more
1. Basic Principles When establishing industrial Ethernet communication between SIMATIC S7-1200 or with other devices in automation projects, engineers need to understand what communication services the integrated Ethernet interface can provide, which communication protocols are supported, how many connection resources are available, and how to flexibly use communication instructions. The S7-1200 CPU integrates a PROFINET … Read more
The Baoxin Guangxi Hongwang project is the world’s first case of domestically produced PLC controlling a high-speed acid rolling mill. Prior to this, the Hongwang Hunan base had already conducted preliminary explorations, with its silicon steel base deploying the Baoxin PLC system, covering 15 production lines and over 100 control units. The order for Guangxi … Read more