Follow “Java Matters” and select “Star” to receive a free Java book package, whether you are a newcomer or an experienced developer in this new era.Source: Online. When your server’s CPU reaches 100%, how do you troubleshoot the abnormal fault? At the end of this article, a shell script will be shared to help you … Read more
A multimeter is the preferred tool for electricians to troubleshoot faults. For many electricians, short circuit faults are easy to check with a multimeter, but finding breakpoints is not as straightforward. Today, I will share a method for using a multimeter to check for wire breakpoints. The steps are as follows:1. Connect one end of … Read more
1. Correct Use of the Multimeter To use the multimeter correctly, familiarize yourself with the dial. Adjust the two zero position regulators gently. Choose the correct terminals, ensuring the red and black probes are inserted into the right holes. Turn the switch to the correct range. Select the appropriate measurement range for accurate readings. Ensure … Read more
Search on WeChatElectrician and Electrical Learning As a maintenance electrician, it seems unreasonable or even impossible to not come into contact with PLCs in automation control. Nowadays, some manufacturers of electrical cabinets try to equip even a simple start-stop circuit with an unknown PLC to appear more advanced and align with international standards. You can … Read more
Guide to Troubleshooting Industrial Communication Protocols: EtherCAT vs Profinet 0 ▲ A High-Frequency and Underestimated Technical Blind Spot: Port Configuration Errors When Switching Communication Protocols As a veteran in industrial control for ten years, I have seen too many engineers stumble during the selection and debugging of communication protocols. Especially when switching from Profinet to … Read more
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
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
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
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
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