Why Is the CAN Bus Termination Resistor 120Ω?

Why Is the CAN Bus Termination Resistor 120Ω?

The termination resistor for the CAN bus is generally 120 ohms. In fact, during design, it consists of two 60 ohm resistors connected in series. There are typically two nodes of 120Ω on the bus, which is a well-known fact for anyone with a basic understanding of the CAN bus. However, as someone who struggles … Read more

How Many Types of Fieldbus Do You Know?

How Many Types of Fieldbus Do You Know?

1. Foundation Fieldbus (FF) This was established in September 1994 by the collaboration of American Fisher-Rousemount, Yokogawa, ABB, Siemens, Invensys, and over 80 other companies to create the ISP protocol, along with Honeywell and over 150 companies in Europe to create the WorldFIP protocol. This bus has been widely used in the field of process … Read more

Collection of Fieldbus Knowledge

Collection of Fieldbus Knowledge

In the development of industry, fieldbus plays a very important role, mainly applied in fields such as petroleum, chemical, electric power, medicine, metallurgy, manufacturing, transportation, national defense, aerospace, agriculture, and buildings. Today, I will introduce several types of fieldbus such as the Modbus communication protocol, PROFIBUS, FF, and CAN bus. Origin and Development of Modbus … Read more

Analysis of In-Vehicle Networks

Analysis of In-Vehicle Networks

Introduction to In-Vehicle Networks As the complexity of electronic control systems increases, and the demand for communication capabilities among the electronic control units (ECUs) within vehicles grows, the use of point-to-point connections leads to an increase in wiring harnesses inside the vehicle. This creates significant challenges for reliability, safety, and quality in automotive design and … Read more

Detailed Explanation of the Four Major Automotive Bus Technologies

Detailed Explanation of the Four Major Automotive Bus Technologies

The automotive bus we are most familiar with is CAN, while LIN and FlexRay may be somewhat unfamiliar to many. Next, let’s introduce these four types of automotive buses. The automotive bus is the communication network that connects automotive devices or instruments at the lower layer of the vehicle’s onboard network.Currently, there are four mainstream … Read more

The Battleground of Smart Cars: Differences Between CAN FD and Traditional CAN

The Battleground of Smart Cars: Differences Between CAN FD and Traditional CAN

With the booming development of automotive electronics and industrial automation, the number of devices and data volume on the CAN bus has greatly increased, posing significant challenges to the CAN bus. To meet the higher bandwidth and data throughput requirements, CAN FD (CAN with Flexible Data-Rate) was born. So what exactly are the differences between … Read more

Understanding The Usage of Modal Verbs Can and Could

Understanding The Usage of Modal Verbs Can and Could

Modal Verbs Usage of Can and Could 1. Indicates ability or objective possibility, and can also express requests and permission. Can you finish this work tonight? Man cannot live without air. — Can I go now? — Yes, you can. Note: Could can also express requests, with a more polite tone, mainly used in questions, … Read more

Automotive CAN Communication Network Fault Diagnosis Techniques

Automotive CAN Communication Network Fault Diagnosis Techniques

As people’s demands for automotive safety, comfort, exhaust emissions, and fuel economy become increasingly stringent, the amount of information exchanged between control units is growing, and the number of sensors and wires is rapidly increasing, making it more difficult to troubleshoot and repair. To ensure that the electronic systems in vehicles remain operational without taking … Read more