Function Blocks

PLC Control with ST: Learning Notes on Version 3 – Utilizing Subroutines, Function Blocks (FB), and Functions (FC) Effectively!

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PLC Control with ST: Learning Notes on Version 3 - Utilizing Subroutines, Function Blocks (FB), and Functions (FC) Effectively!

Previously, we discussed textual programming, where the most important aspect is structuring, similar to writing an article that needs to be divided into chapters, sections, and paragraphs. For ST programming, we also need to appropriately apply subroutines, function blocks (FB), and functions (FC) to break down the program, making it more organized and clear! Chapter … Read more

Understanding PLC Instruction Systems and Their Classifications

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Understanding PLC Instruction Systems and Their Classifications

The entire set of instructions possessed by a PLC is referred to as the PLC’s instruction system. The instruction system represents the performance or functionality of the PLC. Generally speaking, a PLC with strong functionality and good performance will have a rich instruction system, not only with a variety of instruction types but also with … Read more

PLC: Low Ladder Diagram Programming Efficiency? Master These 5 Function Blocks to Double Your Development Speed!

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PLC: Low Ladder Diagram Programming Efficiency? Master These 5 Function Blocks to Double Your Development Speed!

Hello everyone, I am Xiao Chen. Today, let’s discuss a common issue that many PLC beginners encounter: why does a large number of ladder diagrams make the program seem bloated and difficult to maintain?In fact, while ladder diagrams are intuitive, programming purely with basic instructions is indeed inefficient.Mastering Function Block programming can make your PLC … Read more

Intermediate PLC Programming: Modular Encapsulation Reduces Code Maintenance Costs by 50%!

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Intermediate PLC Programming: Modular Encapsulation Reduces Code Maintenance Costs by 50%!

🔥 The Nightmare of Traditional Code Development: Endless Pain Points of Difficult Maintenance and Expansion Is your PLC program becoming increasingly bloated? Does a slight change in logic cause the entire system to crash? When customers propose new requirements, does your mood shift from “I can add some features” to “This code is unchangeable”? Don’t … Read more

Implementation of Interconnectivity Technology in PLC Intelligent Manufacturing System Function Block Programming

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Implementation of Interconnectivity Technology in PLC Intelligent Manufacturing System Function Block Programming

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

Quick Troubleshooting Design Patterns for Function Block Diagrams in PLC Process Control

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Quick Troubleshooting Design Patterns for Function Block Diagrams in PLC Process Control

Click the blue text to follow! Quick Troubleshooting Design Patterns for Function Block Diagrams in PLC Process Control A few days ago, Xiao Zhang rushed over from the workshop, sweating profusely: “Old Li, the production line 3 has stopped again, and the system is indicating a function block error. The management is pushing hard, what … Read more

Simplified Maintenance Strategies for Smart Home Human-Machine Interface Design Using PLC Function Block Diagrams

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Simplified Maintenance Strategies for Smart Home Human-Machine Interface Design Using PLC Function Block Diagrams

Click the blue text to follow! Simplified Maintenance Strategies for Smart Home Human-Machine Interface Design Using PLC Function Block Diagrams Last week, Xiao Zhang graduated from school and came to our factory for an internship. He was assigned to debug the human-machine interface of the smart home control system. After a whole day of work … Read more

PLC Smart Home Control Algorithm Function Block Programming Technology

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PLC Smart Home Control Algorithm Function Block Programming Technology

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

Detailed Explanation of Common Standard Function Blocks in PLC: Core Components to Enhance FBD Programming Efficiency

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Detailed Explanation of Common Standard Function Blocks in PLC: Core Components to Enhance FBD Programming Efficiency

Hello everyone! Today, let’s talk about standard function blocks in PLCs. To be honest, many engineers have used PLCs for years but are still a bit confused about using standard function blocks. What a pity! These little blocks are the secret weapon to improve programming efficiency—it’s incredible! Just last week, I encountered a situation where … Read more

Comprehensive Guide to PLC Function Blocks: Master in One Week

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Comprehensive Guide to PLC Function Blocks: Master in One Week

As a veteran in industrial control with over ten years of experience, I often see many beginners struggling to understand function blocks in PLC programming. Today, I will systematically walk you through the most commonly used function blocks in PLCs. Mastering these basic function blocks will enable you to handle about 80% of industrial control … Read more