Plc scada details and comparison

Post on 09-Aug-2015

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Transcript of Plc scada details and comparison

A Power Point Presentation on “Industrial Automation”

Submitted By:-

Tamanna Taneja

EEE-VII SEM

Submitted To:-Er. Balram kasniyaHOD-EEE

What is Automation?

•As the name suggests ‘Automation’ means to perform automatic operations by means of different kinds of machines.•Automation is the use of control systems and information technologies to reduce the need for human work in the production of goods and services.•It is used to reduce human interference and and efforts

Why Automation required in industry

Productivity

Quality Labour Cost

Plant

Total Automation Manufacturing Competitiveness Solution

History of “Automation”

Manual Control

Hard Wired Logic control

Pneumatic control

Electronic control using logic Gates

Programmable logic controllers (PLC)

Components used in “Automation”

•Sensors•Transmitters•Control System

PLC DCS (Distributed Control System) PID Controllers (Proportional,

Integral & Derivative)•Output Devices Actuators Drives Control Valves Solenoid Valves

Tools of “Automation”

PLC (Programmable Logic Controller)

SCADA (Supervisory Control and Data

Acquisition)

HMI (Human Machine Interface)

What is PLC?

•PLC-programmable logic controller • A programmable Logic controller is simply a solid state industrial computer that perform discrete or sequential logic in a factory environment.

Advantages of plc:-reliability and flexibility in operation. Cost effective for controlling complex systemSmall physical size, shorter project time In-house simulation and testing of projectSecurity

PLC v/s COMPUTER

PLC• Executes simple program

in milliseconds, scan time is much smaller than 1/60 seconds.

• Objective is to make yes/no,0/1 decisions.

• Special purpose device, same program is repeated continuously.

• No peripharals.• Programmed using

ladder-logic

COMPUTER• Possibly complicated

program, often timing is not critical

• It may include floating point, arithmetic, manip-ulation of data

• General purpose, possibly different programs

• Need peripherals• Programmed using high-

level lang.

What constitute a PLC?

Configuration of PLC

8 Analog Inputs 1 Analog Output

Up/Down Fast Counter

Up Counter

Programming Terminal PC Connection

Unitelway Port for connection of up to 5 Slaves

memory expansion port

communications port

TSX37-22

Built in display for I/O (in-rack, AS-i)

I/O Modules

Inputs and Outputs of PLC

Power supply and memory of PLC:-

A power supply of 120v is typically used to drive the PLC, this power supply converts the 120v ac in to dc voltage of 5v.

RAM (Random Access Memory ),a volatile

memory is used for program storageROM (Read only memory),a non–volatile memory is used for data storage.

Executing any signal in PLC

Programming in PLC:-Languages used in PLC for the purpose of

programming are:-•Ladder Language•Functional block Diagram(FBD)•Industrial list(IL)•Drive Functional Block(DFB)•Structured test language

Out of all the above, Ladder Logic is the most commonly used. The ladder logic language id defined as:-

Logical continuity in a ladder rung occurs when there is a continuous path of TRUE conditions from the left power to the output instructions. When there is a logical continuity and the output being energised.

Showing NO and NC switches in PLC

A view of the PLC working screen

SCADA(Supervisory control and Data Acquisition)

•SCADA is real time industrial process control systems used to centrally remote or local industrial equipment such as motors, valves, pumps, relays, etc•It generally refers to an industrial system (ICS).•It is a production automation and control system based on PCs.

Features of SCADA

Features of typical SCADA software:-

Dynamic process graphic Real-time and Historical trending Alarms Recipe Management Security Device connectivity Script for logic development Database connectivity

Architecture OF SCADA

Trending in SCADA

Analogous symbols of general elements in SCADA

Requirements of SCADA

Applications of SCADA

•Production department•Quality department•Maintenance department•Enterprise information•Engineering department•Manufacturing department

Application of SCADA in various plants

THANKS

QUERIES??