Author: Gentle But Ruthless Character Original Link: http://blog.csdn.net/qq_25827845/article/details/66975129 Please indicate the source when reprinting TCP/IP Protocol TCP/IP is not a single protocol, but a general term for a protocol suite. It includes the IP protocol, ICMP protocol, and TCP protocol. Here are some key points to note: Internet Address: This is the IP address, generally … Read more
From: Juejin, Author: Ruheng Link: https://juejin.im/post/6844903490595061767 1. TCP/IP Model The TCP/IP protocol model (Transmission Control Protocol/Internet Protocol) consists of a series of network protocols that form the foundation of the Internet and are the core protocols of the Internet. The reference model based on TCP/IP divides protocols into four layers: Link Layer, Network Layer, Transport … Read more
1. Introduction As application layer developers, the network protocol we most often encounter is typically the transport layer’s TCP (another important protocol at this layer is UDP). However, when it comes to the IP protocol, application programmers are more familiar with the concept of an IP address, and it becomes difficult to delve deeper. This … Read more
When it comes to the protocols we encounter most in computer networks, we cannot ignore the TCP/IP protocol. The TCP/IP protocol is also the most famous protocol on the Internet, so let’s discuss the TCP/IP protocol together. Historical Background of TCP/IP Before the TCP/IP protocol existed, back in the 1960s, many countries and regions recognized … Read more
Table of Contents 1 Overview of CAN 1.1 What is CAN 1.2 History of CAN 1.3 CiA Organization 1.4 OSI Model of CAN 1.5 Characteristics of CAN 1.6 Topology of CAN 1.7 Data Frame of CAN 1.8 Common CAN Application Layer Protocols 2 Overview of CANopen 2.1 What is CANopen 2.2 CANopen Network Model 2.3 … Read more
Abstract CANopen is a high-level communication protocol built on the Controller Area Network (CAN), where the object dictionary is the core concept of the protocol. Mastering its related content thoroughly will allow you to use CANopen with ease and confidence. The CANopen object dictionary (OD: Object Dictionary) is the core concept of the CANopen protocol. … Read more
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
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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
Modbus–The Common Language of Industrial Communication Why Do We Need Modbus? —— How the Common Language of Industrial Communication Ends the “Babel Tower Dilemma” 1. The Era Before Modbus: The “Babel Tower Dilemma” of Industrial Communication In the factory workshops of the 1970s, the dialogue between equipment was like a chaotic “Babel Tower”: Device A … Read more