Overview Of The Ethernet Powerlink Network And The Fepl-02 Module; What This Chapter Contains; Ethernet Powerlink Network - ABB FEPL-02 Ethernet POWERLINK User Manual

Hide thumbs Also See for FEPL-02 Ethernet POWERLINK:

Table of Contents

Overview of the Ethernet POWERLINK network and the FEPL-02 module 21

Overview of the Ethernet

POWERLINK network and the

FEPL-02 module

This chapter contains a short description of the Ethernet

POWERLINK network and the FEPL-02 Ethernet POWERLINK

adapter module.

Ethernet POWERLINK is a communication profile for Real Time

Ethernet. It extends standard Ethernet IEEE802.3 with a

mechanism to transfer data deterministically. The mechanism is

called Slot Communication Network Management (SCNM). SCNM

is managed by a networked device designated as the Managing

Node (MN). All other nodes are Controlled Nodes (CN).

Unlike standard Ethernet, SCNM ensures that only one node is

accessing the network at a time. The schedule is divided into an

isochronous phase and an asynchronous phase. During the

isochronous phase, time-critical data is transfered, while the

asynchronous phase provides bandwidth for the transmission of

data that is not time-critical. The MN grants access to the physical

medium via dedicated poll request messages. As a result, only one

CN has access to the network at a time, and thus no collisions

occur.

Table of Contents