Over 70,000 friends have followed this industrial control WeChat platform:Technical sharing, Learning exchange, Industrial control videos PLCs have strong self-diagnostic capabilities. When there is a fault in the PLC itself or in peripheral devices, the diagnostic indicator function of the PLC, indicated by the on/off state of the LEDs, can be used for diagnosis. I. … Read more
Today, I will present an example of interference from a variable frequency drive (VFD) on a PLC’s analog signal and a solution using a signal isolation module to overcome such interference. 1. Example 1: Phenomenon Description In a Siemens PLC, the AO point outputs a 4-20mA current control signal to a Siemens VFD, but it … Read more
In the vast world of the internet, when you enter a URL in the browser’s address bar and press Enter, a grand “drama” of data exchange quietly unfolds. The Hypertext Transfer Protocol (HTTP) serves as a bridge for communication between the client (such as a browser) and the server, enabling web browsing, data exchange, and … Read more
Can’t connect to the Nissan Teana’s Bluetooth? Avoid these pitfalls! Have you ever had the frustrating experience of wanting to listen to some music while driving, only to find that the car’s Bluetooth won’t connect to your phone? After fiddling with it for a while, there’s still no sound, and your good mood is instantly … Read more
Have you ever experienced the frustration of your Bluetooth mouse suddenly disconnecting while using a Mac? Especially when the mouse disconnects, your work efficiency drops instantly, forcing you to frequently restart or reconnect. Don’t worry, this issue isn’t necessarily due to hardware failure; often, it’s caused by settings or environmental factors. Today, let’s discuss how … Read more
Click the arrow“blue text” to follow us! How to connect Canon TS308 printer to Wi-Fi In the wave of digital office and learning, wireless printing has become an important part of improving efficiency. To achieve the freedom of printing anytime and anywhere, connecting your Canon TS308 printer to a Wi-Fi network is a key step. … Read more
Download DDNS-go Based on CPU Architecture I am using the Thunderbolt Treasure 1, which has an arm7 CPU, so I need to download the corresponding arm7 version. https://github.com/jeessy2/ddns-go/releases Extract the Files and Copy Them to OpenWrt Use WinSCP to connect to OpenWRT and copy ddns-go into it. Download WinSCP If you are unsure where to … Read more
Explore the 【Air Conditioning Repair Family WeChat】 Super Group (9000 members) file repository Click to purchase the Air Conditioning Doctor Ye’s Comprehensive Guide on Fixed and Variable Frequency Processing Steps: (1) First, check if the compressor wiring is loose or reversed. (2) Inspect the appearance of the controller, focusing on the six PWM outputs of … Read more
1. Classification of Black Screen Issues and Corresponding Solutions Black Screen Type Accompanying Symptoms Possible Causes Repair Cost Complete Black Screen Power light off Power board failure 50-100 RMB Backlight On, No Image Indicator light stays on Main board / Logic board issue 100-300 RMB Screen Lights Up Then Turns Off Indicator light blinks Backlight … Read more
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