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SUBMITTED BYALOK KUMAR PADNEYB.TECH. FOURTH YEAR

Roll No. 0812331008ELECTRONICS & COMMUNICATION

(2011-2012)

SUBMITTED TOHEAD OF DEPARTMENT

ELECTRONICS & COMMUNICATIONS.I.T.M. Lucknow

It gives me great pleasure and satisfaction to present seminar report entitled “SCADA SYSTEM” The completion of any task is not only the reward to the person actively involved in accomplishing it, but also the person involved in inspiring and guiding. I’m highly indebted to my seminar guide Er. Gyan Prabhakar for his invaluable support and guidance throughout the work. I extended my heartful thanks to seminar in charge Er. Mahendra Pratap Singh for his support without which the work would have never been realized. Last but not the least; I would like to thanks all friends who directly or indirectly helped me in completion of work.

Alok Kumar PandeyB.Tech. (Fourth Year)

Electronics & CommunicationRoll No. 0812331008

This is to certify that the seminar report entitled “SCADA SYSTEM” has been submitted by Alok Kumar Pandey, B. Tech. (Third Year), Electronics & Communication. Mr. Alok Kumar Pandey of B.Tech. (Fourth Year), E.C. has prepared this seminar under my guidance in the session 2011-2012 and delivered it successfully.

(Seminar Guide) (Seminar In Charge) (Head of Dept.)

CONTENTS

1. Introduction………………………………………2. Brief History……………………………………..3. Components………………………………………4. Working Principle……………………………….5. Conclusion……………………………………….

INTRODUCTION

SCADA is an acronym that stands for Supervisory Control and Data Acquisition. It refers to a system that collects data from various sensors at a factory, plant or any other remote locations and then sends this data to a central system which then manages and controls the data. Some of the industries where SCADA is used are Water treatment plants, Electric Power generation, traffic Signal controls and various automated manufacturing industries. It is also widely used in industries for Supervisory Control and Data Acquisition of industrial processes; SCADA systems are now also penetrating the experimental physics laboratories for the controls of ancillary systems such as cooling, ventilation, power distribution, etc. SCADA systems have made substantial progress over the recent years in terms of functionality, scalability, performance and openness such that they are an alternative to in house development even for very demanding and complex control systems as those of physics experiments.

BRIEF HISTORY

SCADA systems became popular in the 1960’s as the need to monitor and control remote equipments. Early SCADA systems used mainframe technology and required human operators to make action decisions and maintain the information systems.

The foundation of SCADA can be researched back to the 1960's, when simple input and output devices were used to remotely monitor operations in industrial applications. Due to technology advancements, SCADA systems have now developed using advanced software, high performance microprocessors and wireless technology. Additionally, SCADA systems deliver productivity and operational efficiencies by improving the reliability and stability of your system. Corrective action can be automatic and instantaneous. Constant monitoring helps to identify troubled areas before they become critical. The end result is reduced interruptions in service and improved operational costs.

COMPONENTS

An SCADA System usually consists of the following subsystems:

A Human-Machine Interface or HMI is the apparatus which presents process to the human operator, and through this, the human operator monitors and controls the process.

Supervisory system, its use is acquiring data on the process and sending commands to the remote control station.

Remote Terminal Units (RTUs) it converts sensor signals to digital data and sends digital data to the Control Room.

Programmable logical Controller (PLCs) it is a digital computer system which is programmed to be used for automation of electromechanical processes, such as control of machinery in a factory or even a roller coaster, an amusement infrastructure.

WORKING

As discussed earlier the SCADA system includes two parts first is Supervisory Control and second one is Data acquisition. Supervisory Control is a Computer system that sends the data over any wired or wireless link to the Data acquisition server which are connected with each other and further these are connected with PLC system. Now the PLC system performs the relevant operation according to the data acquired. And it is further connected to the human machine interface where the human operator operates the whole process.

CONCLUSION

SCADA helps industries to save time and money.

It eliminates the need of site visit by a human operator for inspection, adjustments and data collection.

SCADA software enables you to monitor the operations in real time. (Real time means that the SCADA system updates you with the information at the same rate as they are occurring.)