3BHE024855R0101 UFC921A101| ABB | Communication mode for conflict detection

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3BHE024855R0101 UFC921A101 | ABB | Communication mode for conflict detection

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The communication medium of CAN bus generally uses twisted pair cables, coaxial cables, or optical fibers. 3BHE024855R0101 UFC921A101 can achieve the function of long-distance data transmission in strong electromagnetic interference environments. Its hardware cost is low, transmission reliability is high, and software overhead is small. It belongs to the bus type serial communication network and has characteristics different from other communication protocols.

The bus supports communication modes for carrier monitoring, multi master control, and conflict detection

Carrier monitoring refers to the detection of an idle state on the bus by each node before sending information messages, and any node has the opportunity to send messages. The priority of message information depends on the final transmission of the information. 3BHE024855R0101 UFC921A101 adopts a non-destructive bus arbitration method based on priority competition in CAN, which is conflict detection. Multiple transmission methods can be achieved through message filtering, with flexible working modes.

The CAN bus protocol is based on messages rather than site addresses

The content of the message on the CAN bus only includes the priority flag area and the transmitted data content. All nodes will receive the message, and the selection of the message depends on the node itself. The same message can be transmitted to all sites or specific sites. Another feature of 3BHE024855R0101 UFC921A101 based on message protocol is that new nodes can be added to the bus system at any time. Once added to the system, the node can receive information and has strong practicality.

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