Control Requirements Three switches are used to operate the PLC to control the frequency converter driving the electric motor for delayed forward and reverse operation. One switch is used for forward control, one switch is used for stop control, and one switch is used for reverse control. When the forward switch is closed, the motor … Read more
Recently, I have been frequently asked by newcomers about I/O mapping, which is quite annoying. After working in this field for over ten years, I have seen too many people who can’t even understand such basic concepts, constantly complicating simple issues. So today, I will discuss I/O mapping in PLCs, so please stop asking about … Read more
Last week, I went to a paper mill to troubleshoot, and the site was a complete mess. Their PLC programmer seemed to be a recent graduate, and the address allocation was a total disaster. I/O addresses were all over the place, and variable names were just a1, a2, b1, b2, it made my head hurt! … Read more
【Introduction】Siemens’ first virtual PLC—S7-1500V was actually launched last year, but there has been little coverage in China. Today, let’s discuss it.Editor | Automation and Engineering TechnologyAuthor | Lao Jing Keywords | Siemens Virtual PLC S7-1500 Approximately 1300 words | Suggested reading time 5 minutesSerious Statement: Unauthorized reproduction is prohibited!In today’s digital age, the industrial automation … Read more
PLC Performance Optimization: Reducing Redundant Scanning and Lowering CPU Load by 35%! 📚 Estimated reading time: 8 minutes > This article will detail the core techniques for PLC performance optimization, helping you significantly reduce CPU load. > – Is your PLC program often experiencing long scan cycles? – How to solve high CPU load issues? … Read more
Recently, I’ve encountered several newcomers asking about the PLC scan cycle issues, it’s really frustrating! They keep making the same mistakes over and over again. After working in this field for over ten years, I’ve seen too many program crashes caused by a lack of understanding of the scan cycle principles. To put it bluntly, … Read more
Friends using Siemens HMI to configure PLC alarms know that, for example, if there are 100 cylinder alarms, the HMI alarm text list needs to configure 100 cylinder HMI alarm texts. This method is time-consuming, labor-intensive, and prone to errors. As shown in the figure:By using the method below, compared to the original way of … Read more
Search on WeChatElectrical Engineering and Electrical Learning PLC program design generally adopts the intuitive method, which is based on the learning experience of the circuit designer, making it relatively subjective and direct. It requires a period of trial and error, debugging the program until it meets the required functions or action requirements; therefore, the designed … Read more
In the previous issue, we discussed the programming applications of two languages: PLC Programming Languages: Ladder Diagram (LD) vs. Structured Text (ST) According to the voting results over the past month, it is clear that Ladder Diagram LD still occupies the largest share, followed by Structured Text ST. The specific data is shown in the … Read more
PLC Intelligent Algorithms: Integration of Machine Learning Applications, 50% Improvement in Anomaly Detection Accuracy! 📚 Estimated reading time: 8 minutes > This article will detail the perfect combination of PLC and machine learning, aiding the upgrade of industrial automation. > – Are you troubled by the high false positive rate of traditional PLC detection methods? … Read more