Today, we will discuss the story of converting a motor sequential start/stop circuit into a PLC ladder diagram, suitable for those who want to get started with PLCs. The requirement is that you must first be able to understand the circuit diagram, and then we will proceed. Here is the sequential start/stop circuit diagram: Traditional … Read more
For beginners in PLC (Programmable Logic Controller), mastering a programming language is a crucial step into the field of automation control programming. Among the various PLC programming languages, Ladder Diagram (LD) is one of the most commonly used due to its intuitive nature and high similarity to relay control circuit diagrams. This article aims to … Read more
Bubble Sort is a fundamental sorting algorithm that sorts by comparing and swapping adjacent elements. Below are the steps to implement bubble sort in a PLC ladder diagram. 1. Control Requirements Input the data to be sorted in the numeric boxes D110-D119 on the touchscreen, totaling 10 items. After sorting, the data will be stored … Read more
When the trigger signal state changes from OFF to ON, the DF instruction is executed, and the output is only activated for one scan cycle. When the trigger signal state changes from ON to OFF, the DFI instruction is executed, and the output is only activated for one scan cycle. If the execution condition is … Read more
Click the blue text for more exciting information PLC Ladder Diagram Insights – Advice for Electrical Beginners To be honest, half of the people programming PLCs in factories today can only copy code from the manual. There are very few who truly understand how to write good ladder diagrams. I’ve been in this industry for … Read more
Click↑↑Technical Training, follow and pin it to subscribe for free long-term 180,000+Industrial control professionals follow this WeChat platform: Technical sharing, learning exchange, industrial control videos Introduction The principles of electrical circuit control and PLC control are interconnected. Naturally, electrical control can be more conveniently and efficiently interpreted through PLCs. So how is the electrical control … Read more
Click the blue text to follow! PLC Safety Control Matters: Insights from an Experienced Electrician Last month, the automated production line in Xiao Wang’s workshop suddenly crashed, and even the safety light curtain was unresponsive, almost leading to a personal injury incident. Later, the factory manager called me to check, and I found that the … Read more
Click on the above Electrical Engineering Learning to follow and star it. A professional self-media in the field of electrical engineering, don’t miss it. 1. Bit Logic Instructions (1) Contact and Coil Instructions Programming principles of PLC ladder diagram language: 1. The ladder diagram consists of multiple rungs, each coil can form a rung, and … Read more
1. Wiring according to the diagram is the highest principle. First, before wiring, one must carefully read the drawings and fully understand the designer’s intentions, rather than relying on personal so-called rich experience. If any unclear or contradictory points are found, one should immediately contact the designer for confirmation before proceeding with the wiring construction. … Read more
Click the blue text to follow! Old Li Talks Technology: The Essentials of PLC Programming 1 Starting from an Emergency Repair Last night, the packaging line in Workshop 2 suddenly stopped, and the manager was extremely anxious. Xiao Wang called me: “Old Li, come quickly, the machine won’t move!” When I arrived on site, I … Read more