Rainbow-electronics CAN интерфейс Instrukcja Użytkownika Pobierz pdf (Strona 7)

BOSCH

ROBERT BOSCH GmbH, Postfach 50, D-7000 Stuttgart 1

Sep. 1991

Part A - page 5

2 BASIC CONCEPTS

CAN has the following properties

• prioritization of messages

• guarantee of latency times

• configuration flexibility

• multicast reception with time synchronization

• system wide data consistency

• multimaster

• error detection and signalling

• automatic retransmission of corrupted messages as soon as the bus is idle again

• distinction between temporary errors and permanent failures of nodes and

autonomous switching off of defect nodes

Layered Structure of a CAN Node

Object Layer

- Message Filtering

- Message and Status Handling

Transfer Layer

- Fault Confinement

- Error Detection and Signalling

- Message Validation

- Acknowledgment

- Arbitration

- Message Framing

- Transfer Rate and Timing

Physical Layer

- Signal Level and Bit Representation

- Transmission Medium

Application Layer

Basic Concepts

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Rainbow-electronics CAN интерфейс Instrukcja Użytkownika Strona 7