Follow+Star Public Account, don’t miss wonderful content Author | strongerHuang WeChat Public Account | Embedded Column Recently, some friends asked about Modbus issues. This article briefly describes some common problems with Modbus. You may not know what Modbus is. In fact, Modbus is widely used in real life and is present in almost all industrial … Read more
This article provides an in-depth study of the Modbus RTU protocol. Background Before introducing Modbus RTU, we can understand that Modbus was invented by Schneider Electric in 1979 and is the first truly industrial bus protocol used in the field. More than forty years later, it is still widely used in various industrial control fields. … Read more
Hello everyone, I am Mai Ge. I previously wrote an article about the modbus protocol, which was just a simple introduction. In this article, we will delve deeper into the modbus RTU protocol. 1. Background Before introducing modbus rtu, we can understand that Modbus was invented by Schneider Electric in 1979 and is the world’s … Read more
Recently, I used the Modbus protocol for communication with third-party devices. Here are some points to summarize and share, to help everyone avoid pitfalls in the future. This article does not provide a systematic explanation of the Modbus protocol but describes the issues and precautions encountered during usage, taking RS485-based Modbus-RTU as an example: 1. … Read more
Click↑↑Technical Training, follow and pinto subscribe for free long-term 200,000+Industrial control professionals follow this WeChat platform: technical sharing, learning exchange, industrial control videos 1. What is the difference between ModBus RTU communication protocol and ModBus communication protocol? The ModBus protocol is an application layer message transmission protocol (OSI model layer 7), which defines a Protocol … Read more
Three Essential Tools for Modbus Learning The three essential tools for learning Modbus are ModbusPoll, ModbusSlave, and VSPD, which can facilitate Modbus debugging. ModbusPoll software is mainly used to simulate a Modbus master station or Modbus client. ModbusSlave software is primarily used to simulate a Modbus slave station or Modbus server. VSPD, which stands for … Read more
Some may still be unaware of what Modbus is; in fact, Modbus is widely used in real life, and it is present in almost all industrial electronic device systems. Below, we will describe some common questions about Modbus for beginners. What is Modbus? Modbus is a communication protocol developed by Modicon (now Schneider Electric) in … Read more
Among various solutions for medium to long-distance communication between MCUs, RS-485 is widely used in factory automation, industrial control, community monitoring, and water resources automatic reporting due to its simple hardware design, ease of control, and low cost. However, the RS-485 bus still has defects in anti-interference, adaptability, and communication efficiency. Improper handling of some … Read more
Currently, common serial interfaces include UART, 232, 422, 485, CAN, etc., but for beginners, it is generally difficult to understand their differences and when to use them. In industrial applications, not all serial interfaces are the same. For instance, the RS-485 serial interface meets the requirements of high speed and industrial robustness, making it a … Read more
RS-485 belongs to wired transmission, so it requires a hardware transmission medium, which can actually be just two wires. The signal transmitted over these two wires is the same; the sender splits this signal into two, but the receiver restores it to the original signal. The advantage of this method can be compared with RS-232; … Read more