Please provide me the pdf file of plc based industrial or home security system

Security is the degree of protection against damages, danger, loss and crime. Security is a form of protections structures
and processes that provide or improve security as a condition. A security system provides a form of protection that
ensures the safety and security of the assets and the threat but is not limited to the elimination of either the asset or the
threat.
Anti-theft security system utilizes an embedded system design with Dual Tone Multi Frequency (DTMF) and a GSM to
monitor and safeguard a car. It secures the car against theft. Upon activation, it automatically demobilizes the car by
disconnecting the ignition key supply from the car battery. This now makes it impossible for anybody so starts the car,
let alone moving with it. In an attempt of theft through the car doors or boot, the system sends text message to the car
owner and at the same time starts up an alarm [1].
Home security has been a major issue where crime is increasing and everybody wants to take proper measures to
prevent intrusion. In addition, there is need to automate home so that the user can take the advantage of technological
advancement.
A PLC is an example of a hard real time system since output results must be produced in response to input conditions
within a limited time, otherwise unintended operation will result.PLC reads the status of the external input devices, e.g.
keypad, sensor, switch and pulses, and execute by the microprocessor logic, sequential, timing, counting and arithmetic
operations according the status of the input signals as well as the pre-written program stored in the PLC. The generated
output signals are sent to output devices as the switch of a relay, electromagnetic valve, motor drive, control of a
machine or operation of a procedure for the purpose of machine automation or processing procedure.
The peripheral devices (e.g. personal computer/handheld programming panel) can easily edit or modify the program
and monitor the device and conduct on-site program maintenance and adjustment. The widely used language in
designing a PLC program is the ladder diagram. With the development of the electronic technology and wider
applications of PLC in the industry, for example in position control and the network function of PLC, the input/output
signals of PLC include DI (digital input), AI (analog input), PI (pulse input), NI (numeric input), DO (digital output),
AO (analog output), and PO (pulse output). Therefore, PLC will still stand important in the industrial automation field
in the future.This project paper presents a model by using PLC that will provide security to their home, office or cabin
etc via SMS using GSM technology.