A node only responds when it detects its own identifier. All ECUs on the bus are effectively in parallel and that’s why all the nodes see all of the data, all of the time. Each network node has a unique identifier. The CAN controller is connected to all the components on the network via these two wires. The wires are called CAN high and CAN low. It allows automotive components to communicate on a single or dual-wire networked data bus up to 1Mbps.ĬAN bus is one of five protocols used in the OBD-II vehicle diagnostics standard.ĬAN bus uses two dedicated wires for communication. It connects the individual systems and sensors as an alternative to conventional multi-wire looms. It become an international standard (ISO 11898) in 1994, and was specially developed for fast serial data exchange between electronic controllers in motor vehicles. CAN bus is a message-based protocol, designed specifically for automotive applications but now also used in other areas such as aerospace, industrial automation and medical equipment. ![]() ![]() ![]() The CAN bus is an automotive bus developed by Bosch, allowing microcontrollers and devices to communicate with each other within a vehicle without a host computer.
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