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GFK-2334A Chapter 1 Overview and Specifications 1-7

PROFIBUS Basics

PROFIBUS Network Overview

• PROFIBUS is an open, vendor independent fieldbus standard for a wide range of

applications in industrial automation, including motion control.

• PROFIBUS is a dynamic technology that grows functionally while complying with

IEC 61158.

• PROFIBUS Guidelines and Profiles provide the means for further technical

development based on the ever-changing communication requirements of the

networks, systems, and devices used in today's industrial automation applications.

The modules covered by this manual use the following protocols defined by the

PROFIBUS specification:

• PROFIBUS-DP High-speed data communication. DP stands for Distributed

Peripherals. In practice, the majority of slave applications are DP applications.

• PROFIBUS DP-V1 Contains enhancements for process automation, in particular

acyclic data communication for parameter assignment, operation, visualization and

interrupt control of intelligent field devices, parallel to cyclic user data communication.

Note: The PROFIBUS logo is a registered trademark of the PROFIBUS International

Organization. Membership in the organization is open to all individuals,

companies and organizations. More information about the organization and the

protocol is available at http://www.profibus.com

Bus Communication

The PROFIBUS specification defines the technical characteristics of a serial field bus

system that links distributed digital controllers on the network, from field level to cell level.

PROFIBUS is a multi-master system that allows the joint operation of several automation,

engineering or visualization systems with their distributed peripherals on one bus.

PROFIBUS distinguishes between the following types of devices:

• Master devices determine the data communication on the bus. A master can send

messages without an external request when it holds the bus access rights (the token).

Masters are also called active stations.

• Slave devices include motion controllers, drives, I/O devices, valves, and

transducers. Slaves do not have bus access rights and can only acknowledge

received messages or send messages to the master when requested to do so. Slave

devices are passive stations and require only small portions of the bus protocol.

The majority of PROFIBUS-DP applications are located at the field level. The field level

typically includes slave devices such as the S2K motion controller station and host

devices such as PLC or PC control systems for the PROFIBUS-DP master station.

Operator interfaces and DCS type systems usually operate at the cell level.

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DCS CPU-366 Bedienungsanleitung Seite 11