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PROFIBUS • 105

Description

WAGO-I/O-SYSTEM 750

PROFIBUS

5 PROFIBUS

5.1 Description

PROFIBUS is an open fieldbus standard, laid down in the European Standard

EN 50 170, Vol. 2 (also IEC).

PROFIBUS DP has been designed for a fast and efficient data exchange

between a control (PLC / PC) and decentralized peripheral equipment, for

example sensors and actuators, digital or analog input and output modules.

A DP System consists of a master and up to 124 slaves:

Master: A DP Master exchanges the data with the slaves via PROFIBUS DP

and controls the bus. It transfers the data between a supervisory control and

the decentralized peripheral equipment.

Slave: DP Slaves are the link to the field side. They edit the input data of the

peripheral equipment for the communication with the master and output the

Master data to the peripheral equipment.

PROFIBUS uses the master/slave method for data transmission. The master

cyclically reads the input data from the slaves and cyclically writes the output

data to the slaves. PROFIBUS DP V1 also supports an acyclic data exchange.

PROFIBUS DP has baud rates from 9.6 kbaud up to 12 Mbaud.

PROFIBUS DP features:

fast system response times

high immunity to interference

master and slave diagnostic

single slaves may fail or be turned off without the fieldbus operations being

interrupted.

Every configuration is stored in the master.

Every slave has a manufacturer-specific identifier that has been assigned by

the PNO (PROFIBUS Nutzerorganisation).

The slaves are described in the GSD files. The GSD file is imported into the

configuration software which makes the configuration of the slave easier.

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Sharp DP-750 Manual de Serviço Página 105