Introduction Modbus was developed byMODICONin 1979 and is a standard forindustrial fieldbus protocol. In 1996, Schneider Electric launched the Modbus protocol based on Ethernet TCP/IP: Modbus TCP. The Modbus protocol is an application layer messaging protocol that includes three types of messages: ASCII, RTU, and TCP. The standard physical layer interfaces for Modbus protocol include … Read more
Modbus Communication Protocol Introduction: The ModBus network is an industrial communication system formed by connecting programmable controllers with intelligent terminals and computers via public or local dedicated lines. Its system structure includes both hardware and software. It can be applied to various data acquisition and process monitoring. The ModBus network has only one master, and … Read more
Follow the “Automation Control System Communication” public account to understand the principles of automation control systems and master the knowledge of automation control systems. Click the blue “Automation Control System Communication” above to follow us. Understanding what the Modbus communication protocol is allows you to perform communication tests on-site using various third-party software. The Modbus … Read more
In industrial control, power communication, and smart instrumentation, data exchange often relies on serial communication. Initially, the RS232 interface was the mainstream choice; however, due to the complexity of industrial sites, various electrical devices generate electromagnetic interference that can lead to signal transmission errors. In 1979, Schneider Electric designed and launched a bus protocol specifically … Read more
Follow+Star Public Number, don’t miss out on wonderful content Source | Network 01 Terminology Interpretation Checksum: A checksum is usually the last digit of a group of numbers, derived from the preceding numbers through some operation, used to verify the correctness of the data set. When code is inputted as data into a computer or … Read more
Today, let’s talk about the differences between Modbus and TCP. These two protocols have both differences and close connections. Their combination not only enables remote network communication based on the Modbus/TCP/IP protocol but also promotes the use of Modbus in its corresponding fields. The Modbus protocol is mainly used in electrical automation and process control, … Read more
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