Can Basic Function; Can Introduction - Ebyte E810-DTU User Manual

Can to ethernet dtu

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4.2. CAN basic function

CAN is an abbreviation of Controller Area Network,which is an ISO international standardized serial

communication protocol.In the automotive industry, various electronic control systems have been developed for safety,

comfort, convenience, low pollution, and low cost.Due to the different data types and reliability requirements for

communication between these systems, there are many cases of multi-bus structure, and the number of wiring harnesses

also increases.In order to adapt to the need to "reduce the number of wire harnesses" and "high-speed communication

of large amounts of data through multiple LANs", in 1986 German electrician Bosch developed a CAN communication

protocol for automobiles. Since then, CAN has been standardized by ISO11898 and ISO11519. CAN is one of the most

widely used fieldbuses in the world and is the standard protocol for automotive networks in Europe.

The high performance and reliability of CAN have been recognized and widely used in industrial automation,

marine, medical equipment, industrial equipment, etc. Fieldbus is one of the hotspots in the development of technology

in the field of automation today. It is known as the computer LAN in the field of automation.Its emergence provides

powerful technical support for distributed control systems to achieve real-time and reliable data communication between

nodes. CAN communication only has two signal lines, CAN_H and CAN_L. The CAN controller judges the bus level

according to the potential difference between the two lines. Bus level is divided into dominant level and recessive level,

which must be one of them. The sender sends the message to the receiver by changing the bus level.

CAN protocol characteristics：

Multi master control.

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System softness.

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Fast communication speed and long communication distance.U p to 1Mbps (distance less than 40M), up to 10KM

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E810-DTU(CAN-ETH) User Manual

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