This article does not explain serial programming but discusses it from an application perspective. More often than not, products are ready, such as touch screens that need to communicate with controllers or PLCs. Ideally, once powered on, communication should be possible without too much operation and configuration. The latter part of the article lists some … Read more
Search on WeChatTechnical Training01Control Requirements Weilun Touch Screen Communication with Mitsubishi FX3U BD Board 02Hardware Devices Weilun Touch Screen Mitsubishi FX3U PLC FX3U-BD Board 03Software GX Works2 Utility Manager 04Wiring 1. Pin Arrangement Diagram Weilun COM2 Pin 485 BD Board 7RX- SDB 6RX+ SDA 9TX- RDB 8TX+ RDA 5GND GND 2. Weilun Communication Terminal Definitions … Read more
The first technical article of 2021, is it earlier than usual? ▉ Overview of RS-485 RS-485, like RS-232, is a serial communication standard. The current standard name is TIA485/EIA-485-A, but it is commonly referred to as the RS-485 standard. RS-485 is widely used in industries such as automation, automotive, and building management. RS-485 bus compensates … Read more
For a long time, I couldn’t distinguish between the CAN and RS-485 buses because I felt there was no significant difference in the circuits; both are differential and connect to conversion chips. RS-485 basically requires only a serial port, while CAN requires a proprietary interface. I have used CAN bus once, but I have used … Read more
1. First, let’s pronounce the name correctly, what exactly is RS? RS = Recommended Standard, which translates to “recommended standard” and is not a patent of any company. The number following it is the version number: 232: Released in 1962, it’s the grandparent, mainly for computer COM ports; 422: Released in 1975, it’s the uncle, … Read more
According to industry experts such as PROCENTEC, applications based on RS-485 fieldbus technology (PROFIBUS®) are continuously growing, and industrial Ethernet (PROFINET) applications are also rapidly increasing. In 2018, a total of 61 million PROFIBUS fieldbus nodes were installed globally, with a 7% year-on-year growth in PROFIBUS process automation (PA) devices. The installation base for PROFINET … Read more
1. History of Serial Ports First of all, the serial port is an essential tool for anyone working with hardware and embedded software, especially when debugging a system with an MCU or CPU. During the debugging process, the first thing we usually do is to light up the GPIO, and the second is to establish … Read more
RS-485 is a differential serial communication standard established by the Electronic Industries Alliance (EIA) in the United States, specifically designed for multi-node, long-distance, and high-interference industrial communication scenarios. Its core advantages include support for half-duplex/full-duplex communication, multi-point bus topology, and strong noise immunity, making it widely used in industrial automation, smart buildings, power systems, and … Read more
‖ System Learning Life is like a marathon; sometimes you need to pause and take a breather to go further. Why does Modbus RTU always appear with RS-485? What is RS-485? Before we dive into this issue, let’s first understand what RS-485 is, which you may have heard of but not fully grasped.In official terms:RS-485 … Read more
A serial port (COM port) is a general term, UART is a protocol, and TTL/RS-232/RS-485 are voltage standards. Data using the UART protocol is transmitted through TTL (board-level short distance), RS-232 (± voltage anti-interference), or RS-485 (differential long distance multi-device) voltage standards, while COM port is the name given by Windows to this type of … Read more