Siemens SIMATIC NET Instructions d'exploitation télécharger pdf (Page 12)

General Information

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SIMATIC NET Twisted-Pair and Fiber-Optic Networks

C79000-G8976-C125-02

1.2 Local Area Networks in Manufacturing and Process Automation

General

The performance of control systems is no longer simply determined by the

programmable logic controllers, but also to a great extent by the environment in

which they are located. Apart from operator control and monitoring, this also

means a high-performance communication system.

Distribution in Manufacturing and Process Automation

Distributed automation systems are being used increasingly in manufacturing and

process automation. This means that a complex control task is divided into smaller,

clearly delineated subtasks with distributed control systems. As a result, efficient

communication between the distributed systems is an absolute necessity. Such

distributed structures have, for example, the following advantages:

S Independent and simultaneous startup of individual sections of a plant or

process

S Smaller, clearer programs

S Parallel processing by distributed automation systems (programmable

controllers)

This results in the following:

- Shorter reaction times

- Reduced load on the individual processing units

S Increased plant or process availability

A comprehensive, high-performance communication system is a must for a

distributed system structure. The basis of such communication systems are Local

Area Networks (LANs) that can be implemented in one of the following ways:

S Electrically

S Optically

S As an electrical/optical combination

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Siemens SIMATIC NET Instructions d'exploitation Page 12