Beckhoff CU8800-0010 Manual de usuario descargar pdf (Pagina 59)

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Lightbus

New ways for control technology

with light

The Lightbus was introduced as

far back

as 1989 as the Beckhoff

system bus for

fast machine controllers, and has become

the market leader in many sectors. These

include, for instance, production machines

for windows, wood processing machines,

presses, packaging machines, machine tools,

and applications in metrology and technical

building services.

Fast and failsafe industrial

communication

The Beckhoff Lightbus system is a fast and

failsafe serial ﬁ eldbus system that was con-

ceived for the needs of automation technol-

ogy. Low-cost and easy-to-process standard

ﬁ bre optic conductor technology is used for

transmission. The crucial advantages of the

ﬁ bre optic conductor are interference immu-

nity to electromagnetic inﬂ uences, complete

electrical isolation of connected modules

from one another and a high data transfer

rate. In conjunction with an optimised,

compact telegram structure, the Lightbus

permits a very high user information data

transfer rate of up to 2.5 Mbits/s.

With one Lightbus interface board,

up to 255 decentralised modules can be

operated with a maximum distance of

up to 300 m between two modules.

Reliability and ﬂ exibility

Reliability is a must – with efﬁ cient test

and diagnostic functions, functioning of

the individual Lightbus modules and com-

munication in the entire Lightbus ring are

monitored cyclically and automatically.

Changes or additions to a system con-

ﬁ guration can be realized easily and reliably

by means of conﬁ guration programs in the

Lightbus system.

Lightbus features

– 2.5 Mbaud data rate

– 25 µs transmission time for 32 bits

of user information

– intelligent commands for read, write,

address initialisation, conﬁ guration

and line test, communication is exe-

cuted automatically

– up to 255 I/O modules in one ring

with up to 65,280 I/O points

(e. g. 64 x 4-channel Bus Terminals

x 255)

– up to 300 m transmission distance

between two I/O modules with HCS

ﬁ bre, 45 m using PMMA ﬁ bre

Increasing automation, increasingly complex production

equipment, rising demands on speed and communication –

this is where conventional cabling and installation technology

reaches its limits.

Light up the dark with the Beckhoff Lightbus system by

replacing complete cable routes with one single ﬁ bre optic

conductor. Instead of extensive I/O interfacing units, only one

Lightbus – a system for the future

The Lightbus system is open and universally

applicable. Lightbus interfaces are available

for common bus and computer architec-

tures, from the standard PC up to VME com-

puters, and

for control systems in use around

the world.

The wide range of distributed Lightbus

components cover the requirements found

in auto

mation technology for items from

displacement sensors, through universal

Bus Terminals up to drive controllers:

– Interface Cards

for all common bus standards

– Embedded PC

the system for control tasks in the

medium performance range

– Bus Terminal

the modular ﬁ eldbus system for

automation

– Modules

the robust modules for fast,

interference-free communication

– Fieldbus Box

the com pact modules in protection

class IP 67

– Drive Technology

Digital Compact Servo Drives for

dynamic positioning tasks

– TwinCAT

the automation software for PLC

and Motion Control tasks

Interference-free ﬁ eldbus communication for fast machine controls

intelligent Beckhoff Lightbus interface board is integrated in

the control computer and the decentralised Lightbus modules

are directly situated locally.

Installation effort and costs are reduced drastically, handling

and maintenance are simpliﬁ ed, and interference immunity and

performance are increased.

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