Click the blue text to follow! PLC Old Li Talks Technology: What’s So Difficult About PLCs? Discussing Those Pitfalls from a Practical Perspective Last week, Xiao Zhang rushed over to me, saying: “Old Li, the production line 3 has stopped again, the system is alarming, and I’ve been looking at it for a long time … Read more
PLC Data Consistency: Transaction Processing Mechanism to Ensure Operational Atomicity! Introduction Hello everyone! Today we are going to discuss a crucial yet often overlooked topic in industrial automation — PLC data consistency. Imagine, when your production line is executing a critical operation, and suddenly there is a power outage, what happens to the data?Don’t worry! … Read more
I remember when I first started in the industry, I took over a PLC program left by a former colleague, and it was a complete mess! There were no comments, variable names were arbitrary, and the program structure was chaotic. It took me three whole days to understand this program. This is why today I … Read more
Click the blue text for more exciting information Having been in this industry for over a decade, I must say, I get really frustrated when I see new electrical engineers designing PLC systems. Especially when it comes to data types, many have no concept at all, just copying a few lines of code from the … Read more
PLC Data Mapping: Memory Mapping Configuration Techniques for Efficient Communication Data Processing! Introduction **Hello everyone!** Today, I want to share a secret that can significantly boost the efficiency of PLC communication—memory mapping configuration techniques. Don’t be intimidated by this technical term, I will explain this powerful feature in the simplest way possible. **Mastering this method … Read more
Fundamentals of PLC Programming: A Beginner’s Guide to Data Types Author: Electric Guy | 15+ years of frontline engineering experience I’ve been asked a lot of questions about PLC data types by beginners, it’s really frustrating! Honestly, isn’t this just the most basic thing? Today’s electrical novices are really falling behind, they can’t even distinguish … Read more
Recently, while debugging a production line at a beverage factory, operator Lao Wang complained, “This touchscreen is too difficult to use, the button positions are unreasonable, and there are frequent issues with inaccurate data display.” This made me realize that many factories face similar problems. In fact, the interaction design between PLCs and Human-Machine Interfaces … Read more
Recently, a young electrician came to ask about PLC configuration. Looking at his program, I was truly speechless. Today’s young people seem to just throw everything into the code without considering the basic scanning cycle. Back in the day when I started in this field, we didn’t even have decent programming software; we used old-fashioned … Read more
Introduction In the field of industrial automation, Programmable Logic Controllers (PLCs) serve as core control devices, and their stable operation directly affects production efficiency and equipment safety. However, various failures are inevitable during long-term operation. Today, PHM has compiled information on common types of PLC failures, their causes, and quick handling methods, hoping to assist … Read more
Last week, I helped a colleague solve a problem with his temperature control system on the production line, which was frequently malfunctioning. After some investigation, it turned out that the variable type was not selected correctly, causing the decimal part to be truncated. This incident reminded me that we must discuss the topic of variable … Read more