1 Introduction A few days ago, a friend asked me for a quick way to configure multiple motors and cylinders on a touchscreen in their project, as configuring each object one by one was cumbersome. In fact, it is possible to use the panel function in the touchscreen. By configuring such a panel, the variables … Read more
Click the blue text for more exciting information Things About Modular Design in PLC Industrial Automation Systems I just returned from a pharmaceutical factory in Jiangsu, where I spent three days and nights getting the production line up and running. To be honest, every time I see those messy PLC programs, I get a headache. … Read more
Hello everyone, I received a submission from a fan who mentioned seeing the RETURN instruction used in someone else’s program and asked me to explain its usage. As the name suggests, RETURN means to return. In a program, it is used to control the execution flow, returning to the point of the higher-level call. When … Read more
Click the blue text to follow! Old Li Talks About PLC Function Block Programming: Making Devices “Understand Each Other” A few days ago, Xiao Wang asked me: “Old Li, why can’t our new Siemens PLC connect with that Japanese Mitsubishi one? I followed the manual, but it seems like the devices can’t ‘understand’ each other.” … Read more
Introduction **Hello everyone!** Today, I want to talk to you about a frequently overlooked but extremely important part of PLC programming —hardware programming interfaces. “Isn’t it just about plugging in a cable?” **You might think so. But I want to tell you that **choosing the right programming interface can improve your debugging efficiency by over … Read more
Building a Home Smart Control System from Scratch: My Experience with LOGO! 8.0 Hello everyone, I am an engineer with over ten years of experience in industrial automation. Over the years, I have frequently used various PLC devices, among which the Siemens LOGO! series has impressed me the most. Today, I would like to share … Read more
Click the blue text to follow! Deployment Strategy for Process Control Based on Modular Design in PLCs Two days ago, Xiao Zhang from the workshop rushed to me: “Old Li, the filling system on production line 3 has problems again. The program is a complete mess; modifying one part requires retuning everything, which not only … Read more
PLC Performance Analysis: Execution Time Monitoring and Program Efficiency Quantification! Introduction Hello everyone! Today I want to share a topic that is often overlooked but extremely important in PLC programming — execution time monitoring and program efficiency evaluation.Did you know? An optimized PLC program can save more than 30% of cycle time! This is not … Read more
Optimizing Performance Design Patterns for Object-Oriented Programming in PLC Factory Informatization Yesterday, a new device arrived in the workshop, and Old Zhang complained, “This PLC program is too messy; changing one part affects the whole system!” This is not an isolated case. As the level of automation in factories increases, the traditional PLC ladder diagram … Read more
Click the blue text to follow! Master Li Talks About PLC Function Blocks in Smart Homes A few days ago, Xiao Wang came to my house and was amazed to see that I could control the lights, curtains, and air conditioning with my phone, his jaw almost dropped. “Master, how much does this cost?” I … Read more