1. INTRODUCTION
Programmable logic controllers (PLCs) are members of the computer family capable of storing instructions to control functions such as sequencing, timing, and counting, which control a machine or a process. The PLC is composed of two basic sections, the Central Processing Unit (CPU) and the Input/Output (I/O) interface system. The PLC measures input signals coming from a machine and through the internal program provides output or control back to the machine.
Ladder logic is the programming language used t ....etc

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ABSTRACT:


A PLC or programmable controller is a digital computer used for automation of electro mechanical processes, such as control of machinery on factory assembly lines.
In past humans was main method for controlling a system. More recently electricity has been used for control and early electrical based on relays. These relays allow power to be switched on and off without a mechanical switch it is common to use relays to make simple logic control decisions.
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Prepared by:
SHAMEER N

Under the guidance of
Dr. S ASHOK


Introduction

In the fast developing world, height of the buildings increased tremendously and the lift has become more of a necessary rather than luxury. When the number of floor increased the control mechanism required for the lift will become more complex. Programmable Logic Controllers are widely accepted industrial control device. With the growth in technology PLCs are now capable of advanced data manipulations, communications ....etc

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Programmable Logic Controllers
Training Contents
Starters
What is a Programmable Logic Controller ?
Theory of Operation
The Internals
How it works
Response Time
Effects of Response Time
Creating Programs
Relays
Replacing Relays
Basic Instructions
Basic Program Example
PLC Registers
A Level Application
How a Ladder is Scanned ?
Main Instruction Set
Latching Instructions
Counters
Timers
One-Shots
Numbers
Math
Number Systems
Boolean Math
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COMPLEX PROGRAMMABLE LOGIC DEVICE


As chip densities increased, it was natural for the PLD manufacturers to evolve their products into larger (logically, but not necessarily physically) parts called Complex Programmable Logic Devices (CPLDs). For most practical purposes, CPLDs can be thought of as multiple PLDs (plus some programmable interconnect) in a single chip. The larger size of a CPLD allows we to implement either more logic equations or a more complicated design. In fact, these chips are large enough to replace dozens of the pesky p ....etc

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Introduction

Programmable Logic Controller ( PLC ) is a special purpose computer with digital processing capabilities, designed for real time control in industrial applications.


Controller: an equipment adapting outputs to changes in inputs as per requirement of the process
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INTRODUCTION :-

PLC is a digitally operating electronic apparatus which uses a programmable (through dedicated language such as Relay Ladder Programming) memory for the internal storage of instructions for implementing specific functions such as logic, sequencing, timing, counting and arithmetic to control through digital or analog input output modules, various types of machines and processes.
The programmable controllers (PC) have developed as the heart of the automation of the industries. The PCs offer a number of advantages over th ....etc

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I need the seminar report of Programmable logic controllers. ....etc

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Im Jayawardhan studying final year interested in PLC(progrmamble logic controllers) so please help me out by giving the list of projects u have on PLC and if possible send the details of it also....
thanking you..... ....etc

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PROGRAMMABLE LOGIC CONTROLLERS AND SCADA


Presented by
N. D. Ramesh


Road Map
Introduction
Basic PLC components
Introduction to STEP 7 LITE
Programming PLC and Ladder logic
Exercises
SCADA
Future scope

Introduction
A digitally operating electronic apparatus which uses a programmable memory for implementing specific functions such as :
Logic sequencing
Timing
Counting
Arithmetic control
through digital or analog
input/output modules
Purpose of PL ....etc

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