IRJET- Design and Implementation in Laboratory using Siemens PLC S7-200

International Research Journal of Engineering and Technology (IRJET) e-ISSN: 2395-0056
Volume: 05 Issue: 03 | Mar-2018 www.irjet.net p-ISSN: 2395-0072
© 2018, IRJET | Impact Factor value: 6.171 | ISO 9001:2008 Certified Journal | Page 3846
Design and Implementation in Laboratory Using Siemens PLC S7-200
Praveen Kumar S1, Karuppusamy P2 , Murali P3, Yugandran S4 , Madhan Raj R5
1, 2, 3, 4 UG Student, Knowledge Institute of Technology,Salem-637504
5Assistant Professor, Knowledge Institute of Technology,Salem-637504
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Abstract -This paper deals with the laboratory automation
using Siemens PLC. In this project laboratory appliances are
automatically control by using PLC for energy saving purpose.
This project includes many sensors for various applications.
Temperature sensor which is interfaced to PLC as the
temperature exceeds certain temperature the fan will turn on
and also the speed of fan will be controlled depending on
temperature and LDR sensors used for controlling the level of
illumination of the light. Also the motors are used for curtain
closing and opening purposes. The real time system developed
is highly effective, efficient and robust. The concept of
laboratory automation is toconnect allthesystemsanddevices
so that it can be controlled from anywhere.
Key Words: LDR Sensor, Temperature Sensor, PLC, DC
Motor.
1. INTRODUCTION
Nowadays, the rapid development of information
technology has brought powerful changesto the structure of
automation system, and makespeople to set a higherrequest
to security, comfort and efficiencyoflaboratoryenvironment.
Intelligent appliances have become a research focus in
laboratory automation industry, for how to let projector set,
fan, lightings, curtain closer and other devices work
efficiently and easy to be used. Under such demand
laboratory appliances should not only operate by itself, but
also with other devicestogether,i.e.theyshouldbeconnected
within a wireless network for easy management.
A laboratory automation system integrates electrical
devices in college with each other. The techniques employed
in automationinclude those in building automationaswellas
the control of domestic activities, such as entertainment
systems, PC and changing the projector slides for different
events. Devices may be connected through a computer
network to allow control by a personal computer, and may
allow remote access from the internet. Through the
integration of information technologies with the laboratory
environment, systems and appliances are able to
communicate in an integrated manner which results in
convenience, energy efficiency, and safety benefits. In this
paper we have concentrated on the control of
“Implementation in Laboratory Automation” in the
laboratorypremises. The controlof thesesystemsisachieved
by using various electronic circuitry .e.g. For Fan speeds
controlling system we used the temperature sensor and for
lighting we had used the simple LDR circuit. This electronic
circuitry is controlled by the PLC.
2. LITERATURE REVIEW
As per the Home Automation Using PLCS.Sujatha, K.M.Om
Prakash aldescribes the solution for controlling the home
appliances with the less man power in a different way by
using programming logical devices (PLC). The numerous
benefits of today’shome automation solutionincludessafety
and security, energy savings, money savings, convenience
and control .It improvesthe daily life of seniorsand disabled
by offering voice control and safety items.
As per the An Advanced Home Automation System Using
Mobile PhoneApurvaMisra, Ajay K. Yadavaal describesabout
a unique System for Home automation utilizing Dual Tone
Multi Frequency (DTMF) that is paired with a wireless
module to provide seamless wireless control over many
devices in a house. We can operate our robot from any
distant or remote area. It is a wireless robot but instead of
using a separate wirelessmodule (transmitter and receiver)
we are using the cell phones for this purpose. The principle
used for mobile controlled robot is the decoding of DTMF
tone.
As per the Advancement in Home Appliance Automation
Using PLC, Mrs. Pooja, S.Puridescribes the project which is
based on the programmable logic controller (PLC).
Temperature sensor will help to the monitor ideal
temperature more accurately. As detect the correct
temperature the fan gets on this is better overthetraditional
system also if the correct number is pressed then an then
only the door latch is open this will increases the security
home also because of the providing the limit switch in water
tank the buzzer is on so we can prevent the wastage of
water.PLC is much better when compared to relay based
advantage is that, it consumes less power, low maintenance
cost, can be programmed. Thus, productivity increases.
3. EXISTING METHOD
The existing method deals with the home automation using
PLC. Home appliancesare automaticallycontrolbyusingPLC
for energy saving purpose. This project includes many
sensors for various applications. Temperature sensor which
is interfaced to PLC as the temperature exceeds certain
temperature the fan will turnon and alsothespeedoffanwill
be controlled depending on temperature and level sensors
used for controlling the level of water of the tank. Also the
DTMF is used for door latch system. The real time system
developed is highly effective, efficient and robust. The
conceptof home automationis toconnect allthesystemsand

devices so that it can be controlled from anywhere.PLC is
much better when compared to relay basedadvantageisthat,
it consumes less power, low maintenance cost, can be
programmed. Thus, productivity increases.
Fig -1: Existing Block Diagram
4. PROPOSED METHOD
4. 1. Functional Block Diagram
Fig -1: Block Diagram of Proposed Model
4.2. Description of Proposed Method And Its
Functional Units
The block diagram showsthe automation oflaboratoryusing
Siemens PLC. It showshow the system circuitworksandhow
the data flow goes through it. The proposed system includes
PLC, sensors, control unit, wireless network andsupply unit.
The main aim of this project is to control the laboratory
appliances using mobile as well as by using manual
operation, so that all appliances can be connected using PLC
module. It can be very easy to handle all the appliances with
power consumption.
4. 3. Temperature Sensor
A temperature sensor is a device,typically,athermocoupleor
RTD that providesfor temperature measurementthroughan
electrical EW signal. A thermocouple TIC) is made from two
dissimilar metals that generate electrical voltage in direct
proportion to changes in temperature. An RTD (Resistance
Temperature Detector is a variable resistor that change its
electrical resistance in direct proportion to changes in
temperature in a precise, repeatable and nearly linear
manner
4. 4. LDR
A light-dependentresistor alternatively called anLDR,photo
resistor, photoconductor, or photocell, is a variable resistor
whose value decreases with increasing incident light
intensity.
An LDR is made of a high-resistance semiconductor. If light
falling on the device is of high enough frequency, photons
absorbed by the semiconductorgiveboundelectronsenough
energy to jump into the conduction band. The resulting free
electron (and its hole partner) conduct electricity, thereby
lowering resistance.
4. 5. Siemens PLC-200
SIMATIC S7-200 stands for a reliable, fast and flexible
controller in the micro automation area with a broad scaleof
modules. Programming was based on the easy to learn
engineering Micro/WIN.
TheSiemens PLC S7-200 seriesof micro-programmablelogic
controllers(Micro PLCs) cancontrol a widevarietyofdevices
to supportour automationneeds. The S7-200monitorsinput
and changes outputs as controlled by the user program,
which can include Boolean’s logic, counting, timing, complex
mathoperations, and communications with other intelligent
devices. The compact design, flexible configuration, and
powerful instruction set combine to make the S7-200 a
perfect solution for controlling a wide variety ofapplications.
5. CONCLUSIONS
This project is based on the programmable logic controller
(PLC). Temperature sensor will help to the monitor ideal
temperature more accurately. As detect the correct
temperature the fan gets onthis is betterover thetraditional

system alsoif the projector ison curtain closesautomatically
and light illuminationlevelis controlled by usingLDRsensor.
This automation project has a control of both manual and
user access through automatic controller. PLC ismuchbetter
whencompared torelay based advantage is that,itconsumes
lesspower,lowmaintenance cost, can beprogrammed.Thus,
productivity increases.
REFERENCES
[1] Mrs. Pooja .S.Puri; “Advancement in Home Appliance
Automation Using PLC”, International Research Journal
of Engineering and Technology (IRJET), volume: 03
Issue: 06 June-2016
[2] ApurvaMisra, Ajay K. Yadav, ShrikeshYadav, AshwaniK.
Sonker; “An Advanced Home Automation System Using
Mobile Phone”, International Journal Of Electrical And
Electronics Engineers, ISSN- 2321-2055, Volume 07,
Issue 01, Jan- June 2015
[3] S.Sujatha, K.M.Om Prakash, M.Rajesh Kumar; “Home
Automation Using PLC”, International Journal of
Advanced Research in Electrical, Electronics and
Instrumentation Engineering, ISSN (Online): 2278 –
8875, Volume 5, Special Issue 1, March 2016

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IRJET- Design and Implementation in Laboratory using Siemens PLC S7-200