1. Overview of MODBUS Communication The MODBUS protocol consists of MODBUS protocol over serial links and MODBUS protocol based on TCP/IP. The serial link MODBUS protocol includes MODBUS ASCII (string) and MODBUS RTU. The MODBUS protocol library provided by 200SMART supports MODBUS RTU communication. MODBUS RTU sends data in hexadecimal values. MODBUS ASCII sends data … 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
Modbus Introduction A brand new, customizable Modbus. This is a version you have never seen before. Easy to port and easy to use, with plenty of comments that you will love. The Modbus protocol is the standard communication protocol for industrial control devices, details can be found in the encyclopedia description. Simply put, the Modbus … Read more
Search on WeChat Technical Training In actual industrial automation applications, various communications are essential, such as PN communication, S7 communication, MODBUS TCP communication, and MODBUS communication, among others; however, the most widely used is MODBUS communication, as it is an open, free, and universal communication protocol. Often, during equipment debugging on the industrial site, communication … Read more
Introduction In 1979, Schneider Electric established the Modbus protocol, a bus protocol for industrial sites. Today, many industrial applications using RS485 communication adopt the Modbus protocol. So today we will learn about RS485 communication and the Modbus communication protocol. 1 Preface In fields such as industrial control, power communication, and intelligent instrumentation, serial communication is … Read more
This article aims to give you a clear understanding of Modbus, summarizing related knowledge about Modbus, which is very suitable for beginners. If there are any errors, suggestions and modifications are welcome. What Is a Protocol? Before understanding what Modbus is, let’s first look at what a protocol is. A protocol is a Chinese term, … Read more
Search WeChat Technical Training Introduction Modbus was developed by MODICON in 1979 and is a standard for industrial fieldbus protocols. In 1996, Schneider Electric launched the Modbus protocol based on Ethernet TCP/IP: ModbusTCP. The Modbus protocol is an application layer messaging protocol that includes three types of messages: ASCII, RTU, and TCP. The standard Modbus … Read more
Today, let’s discuss Modbus. Here’s what we’ll cover: 1. Terminology Explanation 2. Background 3. Protocol Principles 4. Transmission Methods 5. Differences Between Modbus RTU and Modbus ASCII 6. Modbus TCP and Its Considerations 7. Function Code Roles 8. Security Analysis of Modbus Protocol 1. Terminology Explanation Checksum The checksum is usually the last digit of … Read more
Search on WeChat Technical Training 1. What is MODBUS? 1. Basic Concepts MODBUS is a communication protocol initially advocated by MODICON (now a brand of Schneider Electric). It has gradually been recognized as a standard communication protocol through practical applications by most companies. As long as data communication or transmission follows this protocol, different systems … Read more
1. Quick Ways to Learn Modbus 1.1 Register Mnemonics As a beginner, one might find the concepts of the Modbus protocol awkward, repetitive, and hard to distinguish, such as Coil Status, Discrete Input Status, Holding Register, and Input Register. Returning to the essence of the matter, in the field of industrial control PLC, it involves … Read more