Hello everyone, I am Da Yi, and today we are going to talk about the serial communication protocol between microcontrollers (MCU) and PLCs. When it comes to serial communication, many of you might feel confused, but don’t worry, I will clarify everything shortly. What is Serial Communication?Communication is everywhere; for example, the way you and … Read more
ClickFollow“PLC Wireless Communication” for daily amazing discoveries! Is RS-232 a standard communication interface or a protocol?? Is RS-232 a bus?? What is the relationship between fieldbus and networks?? Does each bus have a protocol?? What is the main function of the PLC communication module?? It’s all a mess, please advise, thank you. Whoever can explain … Read more
1. The serial port and COM port refer to the physical interface form (hardware). TTL, RS-232, and RS-485 refer to the level standards (electrical signals). 2. When connecting devices, usually only GND, RX, and TX are connected. Vcc or +3.3V power lines are generally not connected to avoid conflicts with the power supply of the … Read more
RS-232 is a serial data communication interface standard established by the Electronic Industries Alliance (EIA) in the United States, originally designated as EIA-RS-232 (commonly referred to as 232, RS232). It is widely used for connecting computer serial interface peripherals. The RS-232C standard, where EIA (Electronic Industry Association) represents the Electronic Industries Alliance of the United … Read more
Industrial Control Classroom Industrial Control Classroom【www.gkket.com】Essential website for engineers Add WeChat:gk-auto Join WeChat group Electrical Automation – Free Materials Worth Over Ten Thousand Click to Download for Free (DownLoad) Serial communication is the most basic communication method faced by electrical engineers, and RS-232 is the simplest among them. Many beginners often confuse UART with RS-232, … Read more
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Serial communication is the most basic communication method faced by electronic engineers, with RS-232 being the simplest among them. Many beginners often struggle to understand the relationship and differences between UART, RS-232, RS-422, and RS-485. This article will discuss the understanding of these concepts to help clarify their relationships. If we compare serial communication to … Read more
Ke Ruida Nationwide Service Hotline: 400-666-1916 1. Different Transmission Methods. RS-232 uses an unbalanced transmission method, known as single-ended communication. In contrast, RS-485 employs balanced transmission, i.e., differential transmission. 2. Different Transmission Distances. RS-232 is suitable for communication between local devices, with a transmission distance generally not exceeding 20 meters. RS-485, on the other hand, … Read more
1. Different Paths, Same Goal RS-232, RS-422, and RS-485 all belong to UART, which stands for Universal Asynchronous Receiver/Transmitter. They can complete communication using just two signal lines (Rx and Tx); However, due to the different voltage levels used by each, converting from UART to RS-232, RS-422, or RS-485 requires a conversion chip like the … Read more
Introduction to RS-232 Serial Port Data transmission between computers or between a computer and a terminal typically employs two methods: serial communication and parallel communication. Serial communication is widely adopted due to its lower cost and fewer lines used, especially in remote transmission, which avoids inconsistencies caused by multiple lines. In serial communication, both parties … Read more