PLC Engineers Complete Equipment Debugging in Advance Using Digital Twin Technology, Alleviating Frequent Business Travel Challenges

Digital Twin technology, as one of the core technologies of the Industry 4.0 era, is profoundly changing the equipment debugging and operation and maintenance models in traditional manufacturing. For PLC engineers, Digital Twin technology provides a powerful tool that combines virtual and real environments, allowing them to complete debugging work in a virtual environment before … Read more

Can a PLC Bypass Relays to Directly Control Contactors?

This depends on the specific model of the PLC. PLCs can be categorized into relay output, transistor output, and thyristor output. Relay-type PLCs can directly control contactors, while transistor and thyristor-type PLCs cannot directly control contactors. The maximum output current of relay-type PLCs is 2A, which can drive AC and DC loads. The allowable load … Read more

Sharing a PLC Constant Pressure Water Supply Project Program I Worked on for Three Years, Ready for Use!

I still remember that hot summer three years ago when I received what seemed like a simple project—designing a constant pressure water supply system for an industrial park. At that time, I thought, isn’t it just a variable frequency drive paired with a few water pumps? Little did I know that this would take three … Read more

Traffic Lights Transformation: How PLCs Precisely Control Urban Traffic Arteries!

> At seven in the morning, the city awakens from its slumber. The traffic at the intersection flows like blood, and the traffic lights act as the “heart valves” controlling the flow. Have you ever wondered: why does the green light always turn red just after the vehicles pass? Why is there a continuous green … Read more

Top 5 Classic Books for Learning PLCs to Build a Complete Knowledge System!

I still remember 15 years ago when I first stepped into that roaring chemical factory workshop, facing walls full of control cabinets and dense ladder diagrams, feeling completely lost. An experienced worker threw me a piece of advice: “Kid, if you want to learn PLC, first digest these few books!” At that time, I had … Read more

How PLC Multilingual Programming Adapts to Complex Programs

The International Electrotechnical Commission (IEC) standard IEC 61131-3 defines five main PLC programming languages, each suitable for different types of control tasks and program complexities. Below is a detailed analysis of how PLC multilingual programming adapts to complex programs. 1. The Five Programming Languages Defined by IEC 61131-3 1. Ladder Diagram (LD) • Characteristics: A … Read more

Shocking the Industry! Optimizing PLC Scan Time for Incredible Efficiency Gains

Shocking the Industry! Optimizing PLC Scan Time for Incredible Efficiency Gains At three o’clock in the morning, I stood in front of a packaging production line, watching the flashing “Scan Timeout” alarm on the display, feeling heavier than the night outside. The client’s production manager paced back and forth beside me, asking every few minutes, … Read more

To the 30-Year-Old PLC Engineer in Confusion: Four High-Paying Career Transition Directions You Must Understand Before It’s Too Late!

To the 30-Year-Old PLC Engineer in Confusion: Four High-Paying Career Transition Directions You Must Understand Before It’s Too Late! Last night at 11 PM, I was debugging equipment in the control room of a chemical plant when my phone suddenly rang. It was a younger colleague I had mentored, his voice filled with anxiety: “Master, … Read more

A Comprehensive Guide to Siemens PLC Comparison Instructions: Understand It Instantly Even with No Background!

Attention industrial control beginners! Want to understand the comparison instructions of Siemens PLC? Don’t worry, this article covers everything from the basics to practical applications, using simple language and examples to help you grasp the concepts easily. After reading, you’ll be ready to dive into programming! 1. What are Comparison Instructions? Simply put, they are … Read more