Description
CHAPTER ONE
1.0 INTRODUCTION
1.1 BACKGROUND OF THE STUDY
A programmable logic computer (PLC) is an industrial digital computer that is generally used to control the process. As it is an industrial computer, a logical program to control the process is prepared in the general computer.
Then this program is transferred to the PLC using cables. This program is stored in the PLC memory.
The logical program is prepared using a programming language called Ladder logic, Statement List, or Functional block diagram. A program is prepared in such a way that the peoples with electrical or instrumentation background can easily understand.
A Programmable Logic Controller consists of various inputs and outputs modules. A PLC monitors the status of switches and sensors using input terminals and based on this status they will give the command to the output devices through the output terminals.
PLCs were first developed in the automobile manufacturing industry to provide flexible, rugged and easily programmable controllers to replace hard-wired relay logic systems. Since then, they have been widely adopted as high-reliability automation controllers suitable for harsh environments.
Since PLC (Programmable Logic Controller) was firstly introduced in 1970 , it has been widely applied to various industrial uses such as machine and process controls. Designed with the latest microprocessor and electronic circuitry, today’s compact-size PLCs feature high level of reliability, performance, speed and networking. The use of PLCs in automated production lines improves system reliability, product quality, information sharing, efficiency and flexibility and thus reduces costs. PLC-310 is a self-contained trainer which consists of a MITSUBISHI PLC main unit, I/O devices for simulation and I/O devices that are commonly used. It provides students with a thorough understanding of the theories and applications of programmable logic controllers. This trainer enables students to learn step by step the fundamentals of PLC and more advanced controls used in industry. This work is aimed at building a Mitsubishi compact fx2n 32mr PLC trainer kit.
1.2 PROJECT MOTIVATION
It is of great importance in lab of any institution to offer students a high level education regarding digital electronics. It is a great essence in technology learning platform. Circuit board can be touched and the component. With trainer kit students will be able to learn step by step the fundamentals of PLC and more advanced controls used in industry
1.3 PROJECT AIM AND OBJECTIVES
The main aim of this work is to setup a Mitsubishi compact fx2n 32mr PLC trainer kit (for batch control of a level tank). The objectives are:
- To practically realize the PLC digital circuits.
- To build a hardware prototype of the PLC trainer kit for educational experimental
- To provide knowledge about components and also verify the theoretical knowledge of PLC
1.4 SIGNIFICANCE OF THE STUDY
By the advent this system, the Understanding level of PLC Digital Electronicsu will increase rapidly and clearly.
This study will provide students with a thorough understanding of the theories and applications of programmable logic controllers.
This trainer enables students to learn step by step the fundamentals of PLC and more advanced controls used in industry.
1.5 FEASIBILITY STUDY
The hardware and software used in the proposed system easily fulfills the need of the proposedu system. The devices used in this system are easily available and very simple to use.
Technical: The devices used in this system are easily available and require interfacing with standard components. Devices are technically feasible for the proposed system.
Economical: Economic in price and are easily available. It is very beneficial as it provides best result at low price. This device can be used in collages, in advance research and even at home. Maintenance of the device is very cheap.
Schedule: The deadline for the completion of this project is very desirable and this project will be completedu within 2 to 3 weeks.
1.6 APPLICATION OF THE STUDY
Mitsubishi Compact Fx2n 32mr PLC Trainer can be used in collages, in advance research, industries and even at home.
1.7 SCOPE OF THE PROJECT
The scope of this work covers the building of a Mitsubishi Compact Fx2n 32mr PLC Trainer which is a self-contained set of electronic and power circuits that can be interlinked by students to create working circuits. The trainer has 16 digital input and output with Ladder Logic as the programming language used. The system has DIN rail mounting type, input voltage of 240Vac and computer programming interface.
