JVL MAC00-EC41 - Introduction to Ethercat

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34 JVL Industri Elektronik A/S - User Manual - Ethernet for MAC and MIS motors

3.1 Introduction to EtherCAT®

3.1.1 Intro to EtherCAT®.

EtherCAT® is a Real Time Ethernet technology which aims to maximize the use of the

100 Mbit, full duplex Ethernet bandwidth. It overcomes the overhead normally associat

ed with Ethernet by employing "on the fly" processing hardware.

An EtherCAT® net consists of a master system and up to 65535 slave devices, connect-

ed together with standard Ethernet cabling.

The slave devices process the incoming Ethernet frames directly, extract or insert rele-

vant data and transfer the frame to the next slave device, with a delay of approx. 4μs.

The last slave device in the bus segment sends the processed frame back, so that it is re

turned by the first slave to the master as a kind of response frame.

There are several protocols that can be used as the application layer. In the CANopen

over EtherCAT® (CoE) technology, the CANopen protocol is applied to EtherCAT®.

CANopen defines Service Data Objects (SDO), Process Data Objects (PDO) and the

Object Dictionary structure to manage the parameters. Further information about Eth

erCAT®, is available from the EtherCAT® technology group http://www.ethercat.org.

TT3041-02GB

MAC EtherCAT® Module

Type:

MAC00- 4 (shown) or

MAC00- 41 (extended I/O)

To be used in following servo products:

MAC50, 095, 140 and 141

MAC400 and MAC402

MAC800

MAC1500 and MAC3000

MIS EtherCAT® motors.

Type:

MIS34xxx xx85 or

To be used in following stepper products:

- Integrated from factory

MIS43xxx xx85