This thing can be quite confusing for beginners; just looking at that pile of PLC models can be overwhelming. I have been in this industry for nearly 20 years and have seen too many novices struggling with books only to arrive on-site completely lost. Let’s get to the point: when selecting a PLC, don’t just … Read more
Recently, the Level C maintenance for Unit #1 has fully commenced. This Level C maintenance is scheduled to last 18 days, with a total of 403 standard maintenance items and 2 special projects planned. Entering the maintenance site, the maintenance team operates in unison, with standardized fencing marking the work areas. Employees from various maintenance … Read more
The spring weather is delightful,with the ‘C Repair’ halfway through, maintenance personnel from various specialties are making the most of the spring, taking on responsibilities with full commitment, clarifying work objectives, and detailing task assignments. They are busy with ‘spring inspections’, tackling ‘C Repair’, and ensuring power supply with higher standards, stricter requirements, and more … Read more
Abstract: In automation control systems, PLCs are responsible for processing and executing various logical operations and control tasks. However, in practical applications, we often add an intermediate relay to the output terminals of the PLC for two main reasons.First Reason: It is impossible to use without an intermediate relay First, let’s explore the first reason: … 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
Encyclopedia of Home Appliances: A Comprehensive Guide from Purchase to Maintenance As an electrical engineer with 20 years of experience, I will unveil the mysteries of home appliances, helping you to purchase, use, and maintain various appliances more intelligently. 0 1. Basic Classification and Working Principles of Home Appliances Home appliances can be roughly divided … Read more
(1) The drive waveform of soft switch welding machines rises and falls at an angle, as shown in the figure below. The waveform of hard switch machines is like a single tube wave, rising and falling straight. Issues with absorption can cause spikes in the waveform. During maintenance, some waveforms may be unfamiliar; if the … Read more
The circuit board of a water purifier is the core component responsible for controlling the entire system’s operation, including water quality filtration, purification, and display functions. If the circuit board malfunctions, it may cause the water purifier to operate improperly, leading to frequent starts and stops. 1. Functions and Components of the Water Purifier Circuit … Read more
Common Faults and Solutions for LCD and DLP Projectors:Projectors are essential electronic devices for our daily office work, and they are indispensable for company meetings and training sessions. However, electronic devices can encounter various faults. What should we do if our projector has minor issues during use? Below, Hongchao Intelligent Security summarizes some common small … Read more
Three-phase asynchronous motors are widely used. When electricians are repairing motors, they often encounter some old motors that lack nameplates or markings, or the nameplates and markings are unclear. How to use a multimeter to determine and test the motor windings, number of poles, speed, etc., is discussed below. 1. Determining the Start and End … Read more