What is CAN bus, advantages and features of CAN bus

1. It has the advantages of strong real-time performance, long transmission distance, strong anti-electromagnetic interference ability and low cost.

2. Adopt two-wire serial communication mode, strong error detection ability, and can work in high noise interference environment.

3. With priority and arbitration functions, multiple control modules are hung to the CAN-Bus through the CAN controller to form a multi-host local network.

4. The packet can be received or blocked based on its ID.

5. Reliable error handling and error detection mechanism.

6. After the sent message is damaged, it can be automatically retransmitted.

7. The node has the function of automatically exiting the bus in the case of serious errors.

8. The packet does not contain a source or destination address, and only uses markers to indicate the function information and priority information.

CAN bus is also called controller area network, generally speaking, it has the following advantages:

1. The data transmission speed is fast, within a range of 40 meters, the baud rate value of the CAN bus can reach 1Mbps, which is a particularly powerful one among all kinds of buses.

2. The distance of data transmission is long, and the farthest can reach 10 kilometers.

3. Strong anti-external interference ability, due to the use of differential voltage signal for data transmission, the anti-interference ability of CAN bus has made a qualitative leap compared with the general industrial bus, even if there is a problem with a node equipment, this node will take the initiative to cut off the connection between the bus, and will not continue to send wrong data to cause the collapse of the entire bus.

4. A CAN bus can connect 128 node devices at the same time, second only to the RS485 bus, which is especially suitable for industrial equipment with large space requirements.

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It has the advantages of strong real-time, long transmission distance, strong anti-electromagnetic interference ability and low cost; Adopt two-wire serial communication mode, strong error detection ability, can work in high noise interference environment; With priority and arbitration functions, multiple control modules are hung to the CAN-Bus through the CAN controller to form a multi-host local network; The packet can be received or blocked based on its ID. Reliable error handling and error detection mechanisms; If the sent message is corrupted, it can be automatically retransmitted; The node has the function of automatically exiting the bus in the case of severe errors; The packet does not contain a source or destination address and uses a marker to indicate the function and priority.

Hello, CAN is the abbreviation of Controller Area Network (CAN), which was developed by Bosch in Germany, which is known for its R&D and production of automotive electronic products, and eventually became an international standard (ISO 11898), which is one of the most widely used and cautious fieldbuses in the world.

Higher data transfer speed than conventional cabling methods.

Compared with the traditional wiring method, the wiring harness is saved, the weight of the body is reduced, and the wiring method of the body is optimized.

If one of the control units connected via the CAN bus fails, the other control units can still send their own data without affecting each other.

The CAN data bus is a two-wire system, and if one of them fails, the CAN system will switch to a single-wire operation mode, which improves the stability of the whole field Changsan.

In practice, the two wires of the CAN system are wound together like "twists", which can effectively prevent the interference and outward radiation of electromagnetic waves.

Based on the CAN bus system, a richer body function can be realized.

The application of the CAN bus system greatly simplifies the layout of the body wiring, which can be reflected in the simple and neat layout of the engine compartment. The function of the body has increased, but the wiring harness has been simplified accordingly, and the simplification of the wiring harness has also brought more convenience to maintenance. During use, in the event of a failure, the output function will be automatically turned off, so that other components on the bus are not affected, which improves the stability of the body electronic control system to a certain extent.

This complete network system that connects various functional components together can realize the sharing of information and data across the vehicle, making the car more intelligent and accurate in terms of control. In fact, this technology has begun to enter the ordinary family car, and is no longer exclusive to luxury cars.

What are the benefits of the total sleepy line sensitive belt system.

The CAN-H line and the CAN-L line are two communication lines in the Controller Area Network (CAN), and they have the following differences:

1.Signal level: The signal level of the CAN-H line and the CAN-L line are complementary.

On the CAN bus, when the voltage on the CAN-H line is higher than the voltage on the CAN-L line, logic 1 is described; When the voltage on the CAN-L line is higher than the voltage on the CAN-H line, it indicates logic 0.

2.Transmit data: The CAN-H line and CAN-L line are complementary bits for transmitting data, respectively. For example, if the CAN-H line transmits logic 1, then the CAN-L line transmits logic 0.

3.Functional differences: CAN-H line and CAN-L line have the same function when transferring data, but have different roles in different devices.

In some devices, the CAN-H line plays the main control role, while the CAN-L line plays the slave role; In other devices, the roles of these two lines may be reversed.

In general, CAN buses use complementary signal levels of CAN-H lines and CAN-L lines to transmit data, and they play different roles in different devices but have the same function when it comes to transmitting data.

CAN is the abbreviation of Controller Area Network, which is an ISO international standardized serial communication protocol. Its full English name is Controller Area Network, which is generally abbreviated as developed by Bosch Company of Germany, which is known for its R&D and production of automotive electronic products, and eventually became an international standard (ISO 11898), which is one of the most widely used fieldbuses in the world.