Distributed Control SystemDistributed Control System

Group DLouay Sirwi

213627Abdallah Jafar

214973

Dr. H. Shabaik SE – 401

IntroductionIntroduction

(DCS) was Introduced in the late 1970’s

Monitor and control distributed equipment with remote human intervention

Dangerous zones and far areas

What is a DCS?What is a DCS?

A Distributed Control System integrates the PLCs and process controllers of a process line into a coordinated, interactive system.

Enables you to manage the process as a complete system

DCS ArchitectureDCS Architecture

Instruments, sensors, and actuatorsInstruments, sensors, and actuators

PLCS and local control loopsPLCS and local control loops

Data Acquisition and InterfaceData Acquisition and Interface

Control rooms and SCADAControl rooms and SCADA

InternetInternet

Remote accessRemote access

Types of DCSTypes of DCS

Several types, like:Smart DCSSixTrak IPm

Smart DCSSmart DCS

Developed by Honeywell’s MICRO SWITCH Division

Advanced industrial control system that’s open at both the controller and device levels to maximize freedom of choice for users

can interface with both PC controllers and PLCs

Smart DCSSmart DCS

Some applications: Food processing equipment Material handling Conveyor Systems

SixTrak IPmSixTrak IPm

A powerful DCS controller based on flexible open standards and packed with a wealth of features that only LINUX can provide such as:

Internet & internal Intranet Accessible by The SIXNET I/O Tool Kit

Choosing DCS systemsChoosing 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

Network ConfigurationNetwork Configuration

Configuration: Geometric physical form of the connections of the nodes and links of the network

1. Star1. Star

All communication is through the central unit

If central unit failed, all network will fail Lots of wiring Full control of data flow

2. Ring2. Ring

Any node can have a direct contact with other

No two nodes can send at the same time (o.w. there will be a collision)

If one node fails, all network will fail

Data sender/receiver are distinguished by the addresses.

3. Bus3. Bus

All nodes have a direct connection with each other Failure of nodes doesn’t affect the network New nodes can be easily added Data sender/receiver are distinguished by the

addresses.

Properties of distributed Properties of distributed systemssystems Robust Flexible Secure Emergent behavior Less expensive installation and better

reliability. Less expensive to expand. Data highway is used to replace wire

from sensor to DCS and to the control valve.

It could do analog and discrete control.

Disadvantages:Disadvantages:

Component cost A distributed system can be

somewhat difficult to maintain Programming them is not easy Computing power per node is

limited

Some manufacturers of the Some manufacturers of the DCS: DCS:

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

Companies in Saudi Companies in Saudi Arabia that uses DCSArabia that uses DCS

SAUDI ARAMCO Ghazlan Power plant SABIC Almost all factories in Jubail and

Yanbu

ThanxThanx

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