ABB RECA-01, Руководство пользователя

Страница: 15 / 86

Overview
15
Overview
What this chapter contains
This chapter contains a short description of the EtherCAT®
protocol and the RECA-01 EtherCAT® Adapter module, a delivery
checklist and warranty information.
EtherCAT
EtherCAT® is a Real Time Ethernet technology which aims to
maximize the utilization of the full duplex Ethernet bandwidth. It
overcomes the overhead normally associated with Ethernet by
employing "on the fly" processing hardware.
An EtherCAT® bus consists of a master system and up to 65535
slave devices, connected together with standard Ethernet cabling.
The slave devices process the incoming Ethernet frames directly,
extract or insert relevant data and transfer the frame to the next
EtherCAT® slave device. The last slave device in the bus
segment sends the fully processed frame back, so that it is
returned 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. One protocol technology applied to EtherCAT® - and
RECA-01 - is CANopen, which defines SDOs (Service Data
Objects), PDOs (Process Data Objects) and the Object Dictionary
structure to manage the parameters.
Further information is available from the EtherCAT® technology
group (
www.ethercat.org ).
RECA-01 EtherCAT® Adapter module
The RECA-01 EtherCAT® Adapter module is an optional device
for ABB drives which enables the connection of the drive to an
EtherCAT® network. Through the RECA-01 EtherCAT® Adapter
module it is possible to