Siemens ST PCS 7 manual Communication

© Siemens AG 2007

Communication

Introduction

■Overview ■Design

The SIMATIC NET network components based on globally es- tablished standards provide SIMATIC PCS 7 with a powerful and rugged range of products for implementing totally integrated communications networks for reliable data exchange between

9all system components and levels of a plant.

The SIMATIC NET products specially developed for industrial applications are completely suitable for all types of plant in all in- dustrial sectors. They are matched to one another and meet high standards, especially in areas where they are subject to extreme influences, such as

•interfering electromagnetic fields,

•corrosive liquids and atmospheres,

•explosion hazards,

•high mechanical loads.

The SIMATIC NET products guarantee expandability and safe- guard investments through compatible further developments as well as uniformity from incoming goods to outgoing goods and from field devices up to the management information system.

Incorporated in Totally Integrated Automation, the unique basis offered by Siemens for uniform automation of all sectors in the production, process or hybrid industries, the SIMATIC NET bus- ses promote fast and reliable communication between the indi- vidual systems/applications of the SIMATIC PCS 7 process con- trol systems such as:

•Automation systems, distributed I/Os and field components

•Asset management/engineering system and operator system

•SIMATIC BATCH and SIMATIC Route Control

•Process control via Internet/intranet and IT applications.

Industrial Ethernet is used as the plant bus as well as OS-LAN (terminal bus) for multi-user systems with client/server architec- ture. For small systems, the "Basic Communication Ethernet" (BCE) integrated in the SIMATIC PCS 7 Industrial Workstations permits operation of single stations and servers on the plant bus even without a CP 1613 communications processor.

In medium and large plants characterized by high requirements, SIMATIC PCS 7 applies modern Gigabit and FastEthernet tech- nology which combines the high security provided by redundant optical rings with the scalable performance provided by switch- ing technology and high transmission rates up to 1 Gbit/s.

PROFIBUS in the DP or PA version is used as the communica- tions medium for interfacing intelligent distributed I/O devices, transmitters and actuators to the controller level. The rugged and reliable PROFIBUS is a universal, open fieldbus complying with the IEC 61158 and IEC 61784 international standards. In the PA version (which permits digital data transmission and power supply for the field devices on a two-wire cable), or with a series- connected isolating transformer (RS 485-iS coupler), it can be routed intrinsically-safe into hazardous areas of Zone 1.

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Siemens ST PCS 7 · November 2007