Thank you for taking the time to read this article. . . Read this article Hello everyone! I am “Feng Says You Listen”, welcome to follow this account! Click on “Feng Says You Listen” above to follow for more exciting content! Creating content is not easy, so I hope friends who like it can like … Read more
Search WeChatAutomation Knowledge Base Hello everyone, I am Lao Zhou, an electrician with over ten years of experience. Recently, many colleagues have messaged me, and the most common question is about learning PLC: “Lao Zhou, how do I learn PLC?” “Is there a quick way to get started?” “Are there any shortcuts?” Every time I … Read more
“From powering on to logging into the shell, every power button you press is accompanied by a Bootloader ritual happening behind the scenes.” Understanding: How U-Boot Boots Linux? When you press the power button on an embedded device, from that moment on, the SoC undergoes a complete and complex boot process: ROM → Bootloader → … Read more
With the advancement of technology, an increasing number of PLCs (Programmable Logic Controllers) are being applied in the automation control of machinery.Currently, many electricians tend to avoid dealing with them, lacking the knowledge to troubleshoot these types of faults. In fact, we can think of PLC control as being quite similar to the traditional button … Read more
After many years in industrial control maintenance, I can tell you that there are actually three common faults with PLCs: all indicator lights are off, a certain input point has no output (manifesting as a specific action failing), and communication issues. Next, let’s look at how to troubleshoot these three problems (applicable to all brands … Read more
🎯 Classic Practical Cases | Analysis of 6 Major Boot Failure Scenarios, from Kernel Crashes to File System Corruption! 📖 Introduction: Do You Feel This Way Too? First Paragraph: Pain Point Scenario Have you ever encountered such a desperate situation? After a system update, it fails to boot, displaying “Kernel panic – not syncing: VFS: … Read more
At three in the morning, my phone alarm shattered the night. The screen glaringly displayed: “Production environment server disk usage at 95%”. My heart skipped a beat as I trembled to connect to the VPN and typed df -h, confirming that terrifying red warning. My instinctive reaction was to delete some seemingly unimportant log files … Read more
After the delivery of a previous design project, due to an operational error by the on-site debugging personnel, the exposed wire ends touched the circuit board (which was coated with a conformal coating) when the rear panel of the device was removed, ultimately causing a short circuit. The feedback from the site indicated that the … Read more
1. Fault Diagnosis Methodology 1. Three-Level Troubleshooting Method A [Hardware Layer] -> B [Software Layer] -> C [System Layer] Hardware Layer: Check power supply, IO modules, wiring Software Layer: Monitor program logic, register values System Layer: Diagnose communication protocols, parameter settings 2. Diagnostic Toolset Tool Function Operation Path LED Indicator Quickly locate module faults Check … Read more
“Bang”—the webpage won’t open, and the browser throws a 404 at you. “Ding”—the backend crashed, and the server responds with a 500. When the browser suddenly goes on strike and only returns a mysterious number? Don’t panic, today we will unveil the mystery behind these numbers, making the internet less of a “mystery”! 1 What … Read more