Control Logic

Design and Implementation of State Machines in Embedded Systems: From Complex Logic to Clear Architecture

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Design and Implementation of State Machines in Embedded Systems: From Complex Logic to Clear Architecture

Introduction Have you ever written code like this: layers of nested if-else statements, a multitude of condition checks, making maintenance a nightmare? // Troublesome embedded control logic <section class="mp_profile_iframe_wrp custom_select_card_wrp" nodeleaf=""> <mp-common-profile class="mpprofile js_uneditable custom_select_card mp_profile_iframe" data-pluginname="mpprofile" data-id="gh_acd22af287b7" data-nickname="An Embedded Programmer" data-headimg="https://cdn-doocs.oss-cn-shenzhen.aliyuncs.com/gh/doocs/md/images/mp-logo.png" data-service_type="1" data-verify_status="1"></mp-common-profile> <br class="ProseMirror-trailingBreak"> </section> void device_control() { if (is_power_on) { if (is_initialized) … Read more

Successful Application of National Nuclear Self-Instrumentation and PLC in the Hydropower Industry

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Successful Application of National Nuclear Self-Instrumentation and PLC in the Hydropower Industry

Successful Application of National Nuclear Self-Instrumentation and PLC in the Hydropower Industry Intelligent Technology and Equipment for Hydropower Station Operation and Maintenance public account intelligent historical article recommendation assistant—your exclusive “Hydropower Think Tank” is now online! On November 6, the National Power Investment Corporation developed the National Nuclear Self-Instrumentation and PLC system, which was completed … Read more

PLC Case Study: Essential for Payment Collection! 4 Steps to Control a Timed Lock Machine with Dynamic Passwords

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PLC Case Study: Essential for Payment Collection! 4 Steps to Control a Timed Lock Machine with Dynamic Passwords

The timed lock machine is a “payment collection trick” in PLCs—it seems like just reading the time and calculating a password, but it actually sets a “time alarm” for the device: when the agreed date arrives, the machine locks automatically, and after the final payment is made, entering a password unlocks it, which is very … Read more

Detailed Application of Omron PLC Set and Reset Instructions

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OmronPLC Set and Reset Instruction Application Details 1. Overview of Set and Reset Instructions In Omron PLC programming, Set (Set) and Reset (Reset) are two basic bit operation instructions used to control the state of output bits: Instruction Function Description Characteristics Set (Set) Sets the specified bit variable to ON (1) state Once set, the … Read more

Modifying Stateflow State Machines with MATLAB Scripts

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In embedded system development, the integration of Stateflow state machines with Simulink models has become a core solution for implementing complex control logic. Traditional manual modeling methods are inefficient in iterative development and large projects, while automating the entire process through MATLAB scripts can significantly enhance development efficiency and system reliability. This article will delve … Read more

Siemens SMART200 PLC Servo Motor and Electric Hoist Control Program Design

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Siemens SMART200 PLC Servo Motor and Electric Hoist Control Program Design

Recently, an old student asked about the design of the Siemens SMART200 PLC servo motor and electric hoist control program. I will summarize and organize the information here for interested students! Project Overview This project originates from the practical need for automated control of a single-arm crane, aiming to build a reliable control system using … Read more

Considerations for Using Function Blocks (FB) in PLCs

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Considerations for Using Function Blocks (FB) in PLCs

1. Considerations for Using Function Blocks (FB) with Enable Inputs (EN/ENO) Function Blocks with EN/ENO behave more “intelligently” but are also more complex, requiring attention to their execution mechanism. 1. Understand the meaning of “not executing” Core note: When EN = FALSE, the internal code of the FB is completely skipped and not executed at … Read more

Two Essential PLC Programming Cases Every Beginner Must Master!

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Two Essential PLC Programming Cases Every Beginner Must Master!

[Beginner’s Confusion] Many beginners in PLC programming often find themselves in the dilemma of “understanding tutorials but getting lost when writing on their own”: staring at the Siemens 1200 programming software, wanting to write a motor control program but not knowing where to start; the examples found online are either too complex or lack clear … Read more

Learning Secrets of Mitsubishi PLC for Beginners

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Learning Secrets of Mitsubishi PLC for Beginners

Recently, I have received many inquiries from beginners asking how to get started with Mitsubishi PLCs. As an engineer with over 20 years of experience, today I will share some basic knowledge about Mitsubishi PLCs to help you quickly enter this “main force” of the automation field. What is a PLC? When it comes to … Read more

Beginner’s Guide to Mastering PLC Ladder Diagrams in 3 Days: From “Confused” to “Programming”

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Beginner's Guide to Mastering PLC Ladder Diagrams in 3 Days: From "Confused" to "Programming"

☝Click the blue text above to follow me. I hope the suggestions at the end of the article will be helpful to you. ☝Click the blue text above to follow me. I hope the suggestions at the end of the article will be helpful to you. To be honest, when I first encountered PLC ladder … Read more