plc scada details and comparison
Post on 09-Aug-2015
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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??
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