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K.SIVAPRASAD (04A31A04A8)

V.V.S.SUBRAHMANYAM (04A31A04B3)

N.V.SURESH (04A31A04B7)N.VENKATARAJUKUMAR (04A31A04B8)

SCADA (Supervisory Control &

Data Acquisition)

Under the esteemed guidance of

Mr.VENKATESHWARULU,Asst.professor

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SCADA refers to supervisory control &data acquisition, which evolved over the past

30 years as a method of monitoring and

controlling large processes in a wide range ofindustries.

SCADA refers to a system that collects data

from various sensors at a factory, plant or inother remote locations and then sends this data

to a central computer which then manages and

controls the data at supervisory level.

What is SCADA?

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Supervisory ControlSystem:

A system placed on top of a realtime control system (SCADASystem).

Control a process that is externalto the SCADA system.

a computer, by itself, is not aSCADA system even though itcontrols its own powerconsumption and cooling.

Thus, the supervisory control

system is not critical to controlthe process in real time asSCADA is there for that.

Data Acquisition:

Stages:-

a) Data collection:- UsingSENSORS readings andequipment status reports arecollected.

b) Data communication:- Collecteddata is communicated to PCusing cable which is connectedthrough PIC.

c) Formatting data:-PIC makessupervisory decisions to compile

and format to adjust normalcontrol values.

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PIC(16F877A)

LM

35

I/P

Temp

DRIVER

IC RELAY

MAX 232

SYSTEM

Switch 2

Switch 1

Switch 3

Switch 4 RELAY

DEVICE

VTG

BLOCK DIAGRAM

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PIC(16F877A)

PIC is a combination of amicrocontroller and an ADC

device.

PIC comprises of

5 ports namely-A,B,C,D,E.

3 Timers.

Master port, Parallel slave port.

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LM 35(Precision Centigrade

Temperature Sensor)

The LM35 series are precision integrated-circuit temperature

sensors, whose output voltage is linearly proportional to the

Celsius (Centigrade) temperature.

The LM35 thus has an advantage over linear temperature

sensors calibrated in Kelvin, as the user is not required to

subtract a large constant voltage from its output to obtain

convenient Centigrade scaling.

The LM35's low output impedance, linear output, and precise

inherent calibration make interfacing to readout or control

circuitry especially easy.

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SERIAL COMMUNICATION

The serial data transmission imply that data are transmitted inthe following way: data are transmitted from transmitter to

receiver bitwise simultaneously using only one line.

MAX-232 converts TTL logic to RS232 LOGIC.

PCSERIAL

COMMUNICATION

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DB9CONNECTOR

RS-232PIC(16F877A)

SENSORS

TEMPERATURE HUMIDITY PRESSURE

HARDWARE SPECIFICATIONS

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MPLAB IDE is a software program that runs on your PC to provide a

development environment for your embedded system design.

CCS COMPILER

SOFTWARE SPECIFICATIONS

MPLAB IDE

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Atlast, we would collect data and make the user available with the

data make him able to control the system .

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FLOW CHARTSTART

READING IN TEMPERATURE(T)

IF

T>K?

DISPLAYS TEMPERATURE

INDICATOR

END

NO

YES

DATA

ACQUISITION

CONTROLLING

ACTION

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APPLICATIONS

1) Industrial processes include those of :

a. Manufacturing,b. Production,

c. power generation,

d. Fabrication,

e. Refining,

2)Infrastructure processes may be public or private :a. water treatment and distribution,

b. Waste water collection and treatment,

c. Oil and gas pipelines,

d. Electrical power transmission and distribution,

e. Large communication systems.

3) Facility based processes may be public or private :a. Buildings, airports, ships, and space stations.

b. Monitor and control HVAC, access, and energy consumption.

GAS LINES.

AT OFF SHORES.

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CONCLUSION

SCADA supplements integrated system, which is compact, economicaland versatile.

It acts under the GLOBAL POSITIONING SYSTEM i.e.; the whole

system works in same time domain.

An ease-to-use graphical interface has made the tedious job of

operators very easy.

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QUERIES?