Communication Protocol

Analyzing and Implementing CANopen Protocol (Part 1)

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Analyzing and Implementing CANopen Protocol (Part 1)

CANopen protocol is a high-level protocol based on CAN serial bus system and application layer CAL, and it is also a standardized protocol for various industries. CANopen protocol provides necessary implementation methods for distributed control and embedded system applications, mainly providing: (1) interoperability and interchangeability between different CAN devices. (2) Standardized and unified system communication … Read more

Easy Introduction to CANopen Part Five

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Easy Introduction to CANopen Part Five

1、Process Data ObjectPDO（Process Data Object) As mentioned earlier PDO belongs to process data used to transmit real-time data, that is, one-way transmission without the need for a response from the receiving nodeCAN message to confirm, from a communication terminology perspective, it belongs to the “producer-consumer” model PDO, as shown in the figure, it is like … Read more

Getting Started with CANopen – Part Three

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Getting Started with CANopen - Part Three

1、Process Data Object (PDO) and Service Data Object (SDO) MessageID. When using CANopen, the configuration information and application data that need to be transmitted are placed in the Process Data Object PDO (Process Data Object) and Service Data Object SDO (Service Data Object). These objects are like baskets of fruit sold in the market; they … Read more

Introduction to CANopen Concepts

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Introduction to CANopen Concepts

OD (Object Dictionary): This is an ordered, predefined group of objects that can be accessed via the network, with each object addressed by a 16-bit index and an 8-bit sub-index. The range of a node’s object dictionary is from 0X1000 to 0X9FFF. COB-ID (Communication Object Identifier): This is the message frame ID of the CANopen … Read more

Understanding CAN and CANopen Protocols

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Understanding CAN and CANopen Protocols

CAN (Controller Area Network) and CANopen are communication protocols commonly used in the automotive and industrial automation fields, facilitating communication between various devices and components within a system. CAN is a serial communication standard that operates at the first two layers of the OSI model, namely the physical layer and the data link layer (functioning … Read more

Understanding CAN Bus Protocol – CANOpen Series Tutorial 02

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Understanding CAN Bus Protocol - CANOpen Series Tutorial 02

Follow Our Public Account to Not Miss Any Updates!! This tutorial was originally published by the author strongerHuang in September 2018. Tags: CAN, CANOpen, CanFestival Copyright: Commercial Use Prohibited Disclaimer:This document is for personal learning use only. Please contact the author for authorization before reprinting. 1Introduction The previous article discussed CAN and CANOpen, and I … Read more

RS485 and Modbus Communication Protocol Tutorial

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RS485 and Modbus Communication Protocol Tutorial

Search on WeChat Technical Training In 1979, Schneider Electric established a bus protocol for industrial sites called the Modbus protocol. Nowadays, many industrial applications using RS485 communication adopt the Modbus protocol. Today, we will explore RS485 communication and the Modbus communication protocol. 1. Introduction In fields such as industrial control, power communication, and smart instruments, … Read more

Understanding the Modbus Communication Protocol

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Understanding the Modbus Communication Protocol

Source | Guoguo Little Master Modbus is considered a classic communication protocol in the embedded field. Whether you are a beginner or an engineer with years of experience, it is essential to understand it. 1. What is Modbus? As the name suggests, it is a bus protocol. For example, serial protocols, IIC protocols, and SPI … Read more

Understanding the Modbus Communication Protocol

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Understanding the Modbus Communication Protocol

The Most Comprehensive Free Industrial Control Software! (Click the red text above to get free materials) Introduction:The ModBus network is an industrial communication system formed by connecting programmable controllers with intelligent terminals and computers through common lines or local private lines. Its system structure includes both hardware and software. It can be used for various … Read more

Understanding the Modbus Communication Protocol

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Understanding the Modbus Communication Protocol

Full Set of PLC (Omron and 10 Other Brands) Learning Materials,Free to Claim (Click on the Red Text Above to Claim Materials for Free) Modbus Communication Protocol The Modbus protocol is arguably the most widely used communication protocol in the field of industrial automation. Its openness, scalability, and standardization make it a universal industrial standard. … Read more