1. What is MODBUS? 1. Basic Concepts MODBUS is a soft communication protocol initially advocated by MODICON (now a brand of Schneider Electric). After practical application by most companies, it has gradually been recognized and has become a standard communication protocol. As long as data communication or transmission follows this protocol, different systems can communicate. … Read more
Introduction Today, let’s discuss Modbus, starting with the main content of today: 01 Terminology Interpretation 02 Background 03 Protocol Principles 04 Transmission Methods 05 Differences Between Modbus RTU and Modbus ASCII 06 Modbus TCP and Its Considerations 07 Function Code Roles 08 Security Analysis of Modbus Protocol 01 Terminology Interpretation Checksum: A checksum is typically … Read more
01 Terminology Interpretation 1 word = 2 bytes; 1 byte = 8 bits. Checksum: A checksum is derived from the preceding data through a certain algorithm to verify the correctness of the data set. When inputting codes as data into a computer or other devices, input errors can easily occur. To reduce such input errors, … Read more
Search on WeChat Technical Training Introduction Today, let’s talk about Modbus. First, let’s look at the main content for today: 01 Terminology Interpretation 02 Background 03 Protocol Principles 04 Transmission Methods 05 Differences Between Modbus RTU and Modbus ASCII 06 Modbus TCP and Its Considerations 07 Function Code Functions 08 Modbus Protocol Security Analysis 01 … 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
What is ASCII? ASCII stands for American Standard Code for Information Interchange. It is a character encoding scheme used for electronic communication. Each character or special character is represented by an ASCII code, and each ASCII code occupies 7 bits in memory. In the C programming language, a character variable does not contain the character … Read more
Wu Jianying Microcontroller Development Board Address Taobao Store:【Wu Jianying’s Shop】 Address:【https://item.taobao.com/item.htm?_u=ukgdp5a7629&id=524088004171】 UART is a chip used to control communication between computers and serial devices. One important point to note is that it provides a data terminal equipment interface, allowing the computer to communicate with modems or other serial devices using the RS-232C interface. As part … Read more
Industrial Automation Group Knowledge sharing and mutual assistance Join Now When we talk about the communication protocols between automation devices (such as PLCs, temperature controllers, etc.) and computers, ModBus is a widely used communication protocol. ModBus supports various communication methods, including ModBus RTU, ModBus ASCII, and ModBus TCP. Each communication method has its unique characteristics … Read more
Modbus is widely used due to its advantages The Modbus protocol is standard, open, publicly available, and has no copyright requirements The Modbus protocol supports various electrical interfaces, including RS232, RS485, TCP/IP, and can transmit over various media such as twisted pair, fiber optics, infrared, and wireless The Modbus protocol message frame format is simple, … 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