The multimeter is a multifunctional, multi-range instrument that is widely used and favored by electrical technicians. It can easily measure various electrical parameters such as insulation resistance, low resistance, general resistance, voltage, current, capacitance, diodes, frequency, duty cycle, and TYPE K temperature, playing a crucial role in the maintenance, repair, and troubleshooting of electrical systems. … Read more
Click the blue text to follow! Rapid Troubleshooting Practices of Structured Text in IoT Applications 1 The Truth Behind the Fault Last Tuesday, Xiao Zhang rushed over to me, saying: “Master Li, the data acquisition system on production line 3 has malfunctioned again, and the monitoring center can’t see the temperature data. Production is about … Read more
Click the blue text to follow! Old Li Talks Technology: The Matters of PLC Robot Control Remote Monitoring 1 An Unexpected Inspiration Last week, the robotic arm on the assembly line suddenly stopped working, paralyzing the entire production line. The production manager was frantic, and the young engineers in the technical department couldn’t find the … Read more
Optimizing PLC Protocol: Setting Communication Timeout Parameters to Enhance Adaptability in Harsh Environments! Introduction Dear automation engineers, today I want to share a particularly practical technique for harsh industrial environments — optimizing PLC communication timeout parameters! I believe many of you have encountered this issue: in factories with severe electromagnetic interference and aging lines, PLC … Read more
In a Linux cluster environment, quickly identifying issues and monitoring system performance are core skills for operations personnel. This article compiles 17 high-frequency commands covering system monitoring, process management, resource analysis, and more to assist you in efficient operations. 1. Overall System Monitoring 1. top/htop Real-time view of CPU, memory, and process status, supporting dynamic … Read more
Click the blue text “ShipTechHelper” to follow us Don’t panic about engine failures, consult ShipTechHelper when in doubt Introduction During a voyage, the chief engineer received a call from the duty engineer in the engine room, reporting that the cylinder oil injector cooling water jacket at the upper left front of cylinder No. 4 (SULZER … Read more
1. Correct Use of the Multimeter To use the multimeter correctly, familiarize yourself with the dial before use. 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. Choose the appropriate measurement range for accurate … Read more
When an SD memory card fails to format, it may be due to write protection, file system corruption, virus infection, or hardware issues. Here are the detailed steps to resolve the problem: 1. Check the Physical Write Protection Switch 1. Locate the write protection switch on the side of the SD card (usually marked as … Read more
Click the blue text to follow! PLC Old Li Talks Technology: What’s So Difficult About PLCs? Discussing Those Pitfalls from a Practical Perspective Last week, Xiao Zhang rushed over to me, saying: “Old Li, the production line 3 has stopped again, the system is alarming, and I’ve been looking at it for a long time … Read more
Fundamentals of PLC Programming: A Beginner’s Guide to Data Types Author: Electric Guy | 15+ years of frontline engineering experience I’ve been asked a lot of questions about PLC data types by beginners, it’s really frustrating! Honestly, isn’t this just the most basic thing? Today’s electrical novices are really falling behind, they can’t even distinguish … Read more