SCADA-ppt

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

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 of industries.

SCADA refers to a system that collects data from various sensors at a factory, plant or in other remote locations and then sends this data to a central computer which then manages and controls the data at supervisory level.

What is SCADA?

Supervisory Control System:

A system placed on top of a real time control system (SCADA System).

Control a process that is external to the SCADA system.

a computer, by itself, is not a SCADA system even though it controls its own power consumption and cooling.

Thus, the supervisory control system is not critical to control the process in real time as SCADA is there for that.

Data Acquisition:

Stages:-

a) Data collection:- Using SENSORS readings and equipment status reports are collected.

b) Data communication:- Collected data is communicated to PC using cable which is connected through PIC.

c) Formatting data:-PIC makes supervisory decisions to compile and format to adjust normal control values.

PIC(16F877A)

LM35

I/P Temp

DRIVERIC RELAY

MAX 232

SYSTEM

Switch 2

Switch 1

Switch 3

Switch 4RELAY

DEVICE

VTG

BLOCK DIAGRAM

PIC(16F877A)

PIC is a combination of a microcontroller and an ADC device.

PIC comprises of

• 5 ports namely-A,B,C,D,E.• 3 Timers.• Master port, Parallel slave port.

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.

SERIAL COMMUNICATION

The serial data transmission imply that data are transmitted in the following way: data are transmitted from transmitter to receiver bitwise simultaneously using only one line.

MAX-232 converts TTL logic to RS232 LOGIC.

PC SERIAL COMMUNICATION…

DB9CONNECTOR

RS-232PIC(16F877A)

SENSORS

TEMPERATURE HUMIDITY PRESSURE

HARDWARE SPECIFICATIONS

MPLAB® IDE is a software program that runs on your PC to provide adevelopment environment for your embedded system design.

CCS COMPILER

SOFTWARE SPECIFICATIONS

MPLAB IDE

Atlast, we would collect data and make the user available with the data make him able to control the system .

FLOW CHARTSTART

READING IN TEMPERATURE(T)

IF T>K?

DISPLAYS TEMPERATURE

INDICATOR

END

NO

YES

DATAACQUISITION

CONTROLLING ACTION

APPLICATIONS1) 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….

CONCLUSION

SCADA supplements integrated system, which is compact, economical and 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.

QUERIES?