IL•1F CANopen DS301 | 1 Introduction |
0198441113586, V2.01, 11.2008
1 Introduction
1.1About this manual
This manual describes the fieldbus specifics for products in a fieldbus network addressed via CANopen DS301.
1.2CAN-Bus
The CAN bus (Controller Area Network) was originally developed for fast, economical data transmission in the automotive industry. Today, the CAN bus is also used in industrial automation technology and has been further developed for communication at fieldbus level.
Features of the CAN bus The CAN bus is a standardized, open bus enabling communication be- tween devices, sensors and actuators from different manufacturers. The features of the CAN bus comprise
•Multimaster capability
Each device in the fieldbus can transmit and receive data independ- ently without depending on an "ordering" master functionality.
•
Devices can be integrated into a running network without reconfigu- ration of the entire system. The address of a new device does not need to be specified on the network.
•Prioritization of messages
Messages with higher priority are sent first for
•Residual error probability
Various security features in the network reduce the probability of undetected incorrect data transmission to less than
Transmission technology In the CAN bus, multiple devices are connected via a bus cable. Each network device can transmit and receive messages. Data between net- work devices are transmitted serially.
Network devices Examples of CAN bus devices are
•Automation devices, e.g. PLCs
•PCs
•Input/output modules
•Drives
•Analysis devices
•Sensors and actuators
Fieldbus interface | 9 |
