distributedcontrolsystem-100210003416-phpapp01

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Distributed Control System

Group DLouay Sirwi

213627Abdallah Jafar214973

Dr. H. Shabaik SE 401


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Introduction

(DCS) was Introduced in the late1970s

Monitor and control distributedequipment with remote humanintervention

Dangerous zones and far areas


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What is a DCS?

A Distributed Control Systemintegrates the PLCs and process

controllers of a process line into acoordinated, interactive system.

Enables you to manage the processas a complete system


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DCS Architecture

Instruments, sensors, and actuators

PLCS and local control loops

Data Acquisition and Interface

Control rooms and SCADA

Internet

Remote access


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Types of DCS

Several types, like:

Smart DCS

SixTrak IPm


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Smart DCS

Developed by Honeywells MICRO

SWITCH Division

Advanced industrial control systemthats open at both the controller and

device levels to maximize freedom ofchoice for users

can interface with both PC controllersand PLCs


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Smart DCS

Some applications:

Food processing equipment

Material handling Conveyor Systems


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SixTrak IPm

A powerful DCS controller based on flexible

open standards and packed with a wealth offeatures that only LINUX can provide such as:

Internet & internal Intranet Accessible by The

SIXNET I/O Tool Kit


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Choosing DCS systems

Reliability

Compatibility and operatibility

Graphical interface

Control algorithms (PID, ON-OFF, Fuzzy,Neural networks, etc.)

Processing speed and cycle time

Ease of configuration Ease of use

Support and upgradeability

Cost


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Network Configuration

Configuration: Geometric physical

form of the connections of the nodesand links of the network


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1. Star

All communication is through the central unit If central unit failed, all network will fail

Lots of wiring

Full control of data flow


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2. Ring

Any node can have adirect contact with other

No two nodes can send

at the same time (o.w.there will be a collision)

If one node fails, allnetwork will fail

Data sender/receiverare distinguished by theaddresses.


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3. Bus

All nodes have a direct connection with each other

Failure of nodes doesnt affect the network

New nodes can be easily added

Data sender/receiver are distinguished by the

addresses.


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Properties of distributedsystems

Robust Flexible Secure

Emergent behavior Less expensive installation and better

reliability.

Less expensive to expand.

Data highway is used to replace wire fromsensor to DCS and to the control valve. It could do analog and discrete control.


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Disadvantages:

Component cost

A distributed system can be

somewhat difficult to maintain Programming them is not easy

Computing power per node is limited


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Some manufacturers of theDCS:

Honeywell ABB Control, Inc. Eaton Electrical, Inc.

Mitsubishi Electric Automation, Inc. Phoenix Contact, Inc. Rockwell Automation

Schneider Automation, Inc.

Siemens Energy & Automation, Inc. Square D Company WAGO Corporation
http://www.nema.org/mfgs/abbcontrol.cfmhttp://www.nema.org/mfgs/cummins.cfmhttp://www.nema.org/mfgs/eaton-electrical.cfmhttp://www.nema.org/mfgs/GE-CI.cfmhttp://www.nema.org/mfgs/MEAI.cfmhttp://www.nema.org/mfgs/Phoenix.cfmhttp://www.nema.org/mfgs/Phoenix.cfmhttp://www.nema.org/mfgs/rockwell.cfmhttp://www.nema.org/mfgs/rockwell.cfmhttp://www.nema.org/mfgs/Schneider-Auto.cfmhttp://www.nema.org/mfgs/sea.cfmhttp://www.nema.org/mfgs/SquareD.cfmhttp://www.nema.org/mfgs/WAGO.cfmhttp://www.nema.org/mfgs/WAGO.cfmhttp://www.nema.org/mfgs/SquareD.cfmhttp://www.nema.org/mfgs/sea.cfmhttp://www.nema.org/mfgs/Schneider-Auto.cfmhttp://www.nema.org/mfgs/rockwell.cfmhttp://www.nema.org/mfgs/rockwell.cfmhttp://www.nema.org/mfgs/Phoenix.cfmhttp://www.nema.org/mfgs/Phoenix.cfmhttp://www.nema.org/mfgs/MEAI.cfmhttp://www.nema.org/mfgs/GE-CI.cfmhttp://www.nema.org/mfgs/eaton-electrical.cfmhttp://www.nema.org/mfgs/cummins.cfmhttp://www.nema.org/mfgs/abbcontrol.cfmhttp://www.nema.org/mfgs/abbcontrol.cfm


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Companies in Saudi Arabiathat uses DCS

SAUDI ARAMCO

Ghazlan Power plant SABIC

Almost all factories in Jubail and

Yanbu


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Thanx

U r WeLcOme for Questions

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