The Modbus RTU communication protocol uses a master-slave response method for data communication. Requests can only be initiated by the master (PC, HMI, etc.) through a unique slave address, and the slave (terminal device) responds to the master’s requests, thus enabling half-duplex communication. This protocol only allows the master to initiate requests, and the slave … Read more
Before we start this topic, we should understand a commonly confused issue. The difference between RS485 and MODBUS: RS485 is a physical interface, simply put, it is hardware. MODBUS is an internationally standardized communication protocol used for data exchange between devices from different manufacturers (generally for industrial purposes); the so-called protocol can also be understood … Read more
Modbus Simulation – Essential Skills for Beginners In the field of industrial automation, we often encounter various communication protocols, such as Profibus, ControlNet, Ethernet, Canopen, and Modbus. Among these, the Modbus protocol is the most widely used, free, and open-source, and is supported by almost all manufacturers’ industrial equipment. When working on engineering projects, we … Read more
Q: 1、Now I am starting to learn Weilin Touch Screens, but I don’t know what the differences are between Weilin Touch Screens and Siemens Touch Screens, and what their advantages and disadvantages are? A: When it comes to the differences between Weilin Touch Screens and Siemens Touch Screens, there are mainly three major differences. The … Read more
Click on the “Ji Cheng Training” above to select “Pin to Top Public Account” 150,000+ industrial control professionals follow this WeChat platform: technical sharing, learning exchange, industrial control videos Basic knowledge of human-machine interface is essential for beginners. The product consists of hardware and software. The hardware includes the processor, display unit, input unit, communication … Read more
Siemens operating panels, also known as Siemens touch screens, abbreviated as Siemens HMI, have significant features that meet all user needs, and all display sizes have full functionality, supporting unique high efficiency. They are mainly divided into the following categories: 1. Siemens HMI Keypad Panel This type of Siemens touch screen is easy to install … Read more
Photonic sensors are known for their fast response times, enabling non-contact measurements with high accuracy, high resolution, and good reliability. Additionally, photonic sensors are compact, lightweight, energy-efficient, and easy to integrate, making them one of the most widely produced and applied sensors today. They are extensively used in various fields including military, aerospace, communications, smart … Read more
Click the above“Mechanical and Electronic Engineering Technology”to follow us 1. Common Types of Sensors Category Subcategory Characteristics Detectable Medium Limit Switch Limit Switch Contact type, simple structure, short lifespan Solids that can collide mechanically Micro Switch Proximity Switch Hall Switch High sensitivity, accurate positioning Magnetic materials Reed Switch Lower precision, effective detection distance is short … Read more
A sensor is a device that can sense a specified measurement and convert it into a usable signal according to certain rules. It usually consists of a sensitive element and a conversion element. Below are the classifications and applications of sensors. I. Classification 1. Classification by the physical quantity being sensed * Temperature Sensor: Used … Read more
1. Working Principle Sensors are generally composed of four parts: sensitive elements, conversion elements, conversion circuits, and auxiliary power supplies. 1. The sensitive element directly senses the measured quantity and outputs a physical signal that has a definite relationship with the measured quantity; 2. The conversion element converts the physical signal output by the sensitive … Read more