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
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