Circuit Troubleshooting

Modbus TCP Protocol Optimization Techniques: Programming Secrets to Improve Communication Efficiency by 200%

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Modbus TCP Protocol Optimization Techniques: Programming Secrets to Improve Communication Efficiency by 200%

Industrial Automation Maintenance Manual: Modbus TCP Communication Troubleshooting and Optimization Guide 0 ▲ 90% of Engineers Overlook Modbus TCP Communication Risks: Timeout Settings and Message Boundary Handling Dear friends, I am Wang, and I have been working in industrial control for over ten years. Today, let’s talk about the Modbus TCP protocol, which seems simple … Read more

Unable to Use Serial Port After Driver Installation, Device Manager Error (Code 52)

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Unable to Use Serial Port After Driver Installation, Device Manager Error (Code 52)

Moxa’s serial port devices, such as serial port servers, serial port cards, and USB-to-serial devices, require driver installation to function properly. Sometimes, after installing the driver, issues may arise where the device cannot be used normally. In Device Manager, the device driver shows a yellow exclamation mark, indicating that Windows cannot verify the digital signature … Read more

Linux Application Auto-Start Fails? A Comprehensive Guide to Avoiding Pitfalls with Systemd in 5 Steps!

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Linux Application Auto-Start Fails? A Comprehensive Guide to Avoiding Pitfalls with Systemd in 5 Steps!

IntroductionAs a developer, have you ever encountered a situation where you configured your application to automatically restart after a crash, but the service just won’t come back up? The logs only show a cold <span>status=217/USER</span>, leaving you puzzled? Don’t panic! Today, we will provide a hands-on guide to help you solve the “mystical” issue of … Read more

Top Ten Troubleshooting Methods for Touch Screens

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Top Ten Troubleshooting Methods for Touch Screens

Many users encounter situations where the touch screen becomes unusable due to faults. This is primarily because touch screens are precision devices, and their widespread use leads to frequent malfunctions. Below are some common troubleshooting and maintenance methods for touch screens: When a touch screen malfunctions, first check if the power supply to the control … Read more

Understanding IHC, ICC, and IF: Clearing Up Common Confusions

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Understanding IHC, ICC, and IF: Clearing Up Common Confusions

Immunohistochemistry、Immunocytochemistry and Immunofluorescence are three commonly used applications. Do you often feel confused about these three applications? They indeed have many similarities. Let’s clarify their differences. IF (Immunofluorescence) / IHC (Immunohistochemistry) / ICC (Immunocytochemistry) are three applications, and one part that everyone will definitely not confuse is “Immuno”, because all three applications involve the use … Read more

Repairing the Circuit Board of a Chigo Air Conditioner: A Two-Wave Approach

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Repairing the Circuit Board of a Chigo Air Conditioner: A Two-Wave Approach

Recently, I repaired a 2P Chigo air conditioner. I initially didn’t want to post about it, but there are likely many colleagues in the forum who also use old board components for repairing faulty machines. However, this was my first encounter with a situation where the disassembled board components were also defective, so I wanted … Read more

A Handy Trick for Locating Breakpoints in Wires Using a Multimeter

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A Handy Trick for Locating Breakpoints in Wires Using a Multimeter

Electrical Engineering Learning Network: www.dgdqw.com Follow the official WeChat account of the Electrical Engineering Learning Network “Electrical Engineering and Electronics” to gain more experience and knowledge. The multimeter is the primary troubleshooting tool for electricians. Once accustomed to it, even when a fault occurs that could be diagnosed without a multimeter, one may feel uneasy … Read more

PNOZ Safety Communication in PLC: Ensuring Safety for Personnel and Equipment

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PNOZ Safety Communication in PLC: Ensuring Safety for Personnel and Equipment

Hello everyone, I am Engineer Zhang. Today, I will explain a very important topic in industrial automation – the communication applications of the PNOZ safety relay module. In industrial settings, the safety of personnel and equipment is always the top priority, and PNOZ is a key device specifically designed to ensure this safety. Basic Concepts … Read more

Profibus PA Communication: Bus Technology in Process Automation

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Profibus PA Communication: Bus Technology in Process Automation

Today, I would like to share the Profibus PA bus technology that is frequently used in the field of chemical automation. This is based on my experience during a DCS renovation project at a chemical plant, and I believe it will be helpful for those engaged in process automation. What is Profibus PA To understand … Read more

8 Key Functions of a Multimeter: Do You Understand Them All?

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8 Key Functions of a Multimeter: Do You Understand Them All?

What is a multimeter? A multimeter, also known as a multi-tester, volt/ohm meter, is a versatile measuring instrument that can be classified into analog and digital types. It is a multifunctional, multi-range measuring device that can generally measure DC current, DC voltage, AC current, AC voltage, resistance, and audio levels. Some models can also measure … Read more