Design and implementation of labview based scada for textile mills

IJRET: International Journal of Research in Engineering and Technology eISSN: 2319-1163 | pISSN: 2321-7308
__________________________________________________________________________________________
Volume: 03 Issue: 05 | May-2014, Available @ http://www.ijret.org 773
DESIGN AND IMPLEMENTATION OF LABVIEW BASED SCADA FOR
TEXTILE MILLS
Nirmal Bharatia1
, N. D. Thakur2
1
Electronics Dept., MPSTME, NMIMS, Mumbai, India
2
Assistant Professor Electronics and Communication Dept., MPSTME, NMIMS, Mumbai, India
Abstract
Quality is the watchword of any type of business. A product without quality leads to lack of customer satisfaction and ultimately to
loss. This is true in case of textile industries also. In textile industries, quality maintenance is one of the major problems for fabric
manufacturers. Currently in indigenous small scale textile industries manual or semi- automatic processes are being carried out. The
fabric obtained from such processes lacks consistency in quality, moreover these industries have semi- skilled or unskilled labors,
therefore stringent supervision is required. Normal automation solutions for such industries will be unaffordable. Therefore it is
required to provide economical, reliable and robust automation solution to such industries. This paper addresses the need of factory
automation within the scope of machine control for small scale textile industries. The project presents the design of LabVIEW based
SCADA system for centralized control. It makes use of PLC as a field controller to operate the prototype design of Stenter Machine,
widely used in textile industries. LabVIEW, which is a commonly accepted graphical user interface environment, also provides HMI
front end. The PLC controller and the LabVIEW based SCADA are communicating through the RS-232 link. The control system is
flexible and modular. Due to the intuitive programming of LabVIEW, this system is cost efficient and reliable solution for automation
of small scale textile industries.
Keywords— SCADA; Programmable Logic Controller (PLC); LabVIEW; Stenter Machine; Printing Machine.
----------------------------------------------------------------------***--------------------------------------------------------------------
1. INTRODUCTION
The Indian small scale textile production has a major impact on
the world economy through millenniums. At present fabric
inspection depends on human sight, the result of inspection
influenced by the physical and mental condition of inspector.
Now, all the textile industries aim to produce good quality
fabrics with high production rate. In the textile sector, there are
huge losses due to faulty fabrics.
The faults found in the fabrics are around 80 - 85% of the
defects in the garment industry. These faults are obtained in the
fabrics due to irregular stretching and shrinking of the cloth.
The manual inspection of fabric material is not economical and
work is very dull. Hence, the investment in automated fabric
defect detection is economical when reduction in labor cost
and other benefits are considered.
In recent years, PC-based control technologies have become
widely used industry practice. Benefits include faster design
cycles, lower downtime using diagnostics and simulation tools,
increased productivity and decreased maintenance costs.
Moreover, open system designs that use standard hardware and
operating system software minimize cost, permit system
scalability, and ensure future performance enhancement [1].
One major development from the utility of the PC is the
concept of Virtual Instrumentation, which offers several
benefits to engineers and scientists who aim increased
productivity, accuracy, and performance. Engineers and
scientists, whose needs, applications and requirements change
very quickly, need flexibility to create their own solutions. One
can adopt a virtual instrument to one particular need without
having to replace the entire device because of application
software installed on the PC and the wide range of available
plug-in hardware [2].
The power of Virtual Instruments (VI) application software,
LabVIEW lies in the fact that it empowers the user to include
test equipment as objects in their programs [3]. LabVIEW, as a
programming language, is a powerful tool that can be used to
help achieve these goals. LabVIEW (Laboratory Virtual
Instrument Engineering Workbench) is a graphically-based
programming language developed by National Instruments. Its
graphical nature makes it ideal for test and measurement
(T&M), automation, instrument control, data acquisition, and
data analysis applications. This results in significant
productivity improvements over conventional programming
languages. National Instruments focuses on products for T&M,
giving them a good insight into developing LabVIEW.
The main objective of this paper is to derive a brief idea
about a basic level control scheme through a defined
logic and a visual experience. This paper can be used at its

__________________________________________________________________________________________
higher level as it will provide the basic design guidelines for
the one who wants to implement it on an industry level.
The section 2 in this paper discusses concept of SCADA,
section 3 provides the information about LabVIEW. The
design of system is presented in section 4, followed by the
discussion of system software in section 5. Section 6 discusses
about the implementation of the designed system. The results
and discussion are offered in section 7 and finally conclusion
in the section 8.
2. SCADA SYSTEM
The supervisory control and data acquisition (SCADA) system
is the backbone of modern industry. It provides centralized
control and monitoring of processes with data logging.
2.1 Need for SCADA System
The industrial control systems (ICS), which include SCADA
systems, distributed control systems (DCS), and other smaller
control system configurations such as skid-mounted
Programmable Logic Controllers (PLC) are often found in the
industrial control sectors. ICSs are typically used in industries
such as electric, water, oil and gas, transportation, chemical,
pharmaceutical, pulp and paper, food and beverage, textile
industry and other discrete manufacturing processes.
SCADA systems are highly distributed systems used to control
geographically dispersed assets, often scattered over thousands
of square kilometers, where centralized data acquisition and
control are critical to system operation. They are used in
distribution systems such as water distribution and wastewater
collection systems, oil and gas pipelines, electrical power grids,
and railway transportation systems. A SCADA control center
performs centralized monitoring and control for field sites over
long-distance communications networks, including monitoring
alarms and processing status data. Based on information
received from remote stations, automated or operator-driven
supervisory commands can be pushed to remote station control
devices, which are often referred to as field devices. Field
devices control local operations such as opening and closing
valves and breakers, collecting data from sensor systems, and
monitoring the local environment for alarm conditions.
2.2 PLC as a Field Controller
A Programmable controller is a solid state user programmable
control system with functions to control logic, sequencing,
timing, arithmetic data manipulation and counting capabilities.
It can be viewed as an industrial computer that has a central
processor unit, memory, input output interface and a
programming device. The central processing unit provides the
intelligence of the controller.
PLC is special-purpose industrial computers designed for use
in the control of wide variety of manufacturing machine and
system. PLC also can be defined as a specialized electronic
device based on one or more microprocessors that are used to
control industrial machinery. The term ―industrial‖ on the
definition implies that PLCs are computer designed to operate
in harsh physical and electrical noise environment present in
production plants. The definition defined that PLCs are
computers; hence they must be programmed using a
programming language. There are five standard programming
languages standardize by IEC including Ladder Diagrams
(LD), Function Block Diagrams (FBD), Structured Text (ST),
Instruction List (IL) and Sequential Function Charts (SFC) [4].
Here Delta DVP- 14SS2 PLC is being used. Section 5
discusses the PLC and its working in detail.
3. LABVIEW
LabVIEW provides the flexibility of integration of data
acquisition software/hardware with the process control
application software for automated test and measurement
applications. By LabVIEW-aided PLC controller, the
parameters are adjusted to control the motor and various other
parameters [5].
The information development is complicated by the mix of
hardware and software that exists in plants and the limitation of
traditional systems. We can incorporate LabVIEW into
existing system to add measurements and analysis to processes
to gather complex data and convert it into useful information.
Additionally, through the openness of LabVIEW we can
connect and provide the information where it is needed,
whether that is in a database [6].
The LabVIEW graphical programming paradigm simplifies the
development of your distributed monitoring and control
systems. Creating your application is as simple as dragging and
dropping graphical functions and wiring the objects together to
form a dataflow program. Built-in libraries include resources
from general programming functions to powerful, application-
specific routines [7]. Construct interactive user interfaces from
hundreds of included objects, such as charts and graphs,
numerical representations, and Boolean operators. LabVIEW
also features robust debugging tools, including probes,
breakpoints, execution highlighting, and the ability to single
step through your code. In LabVIEW, you build a user
interface with a set of tools and objects. The user interface is
known as the front panel. You then add code using graphical
representations of functions to control the front panel objects.
The block diagram contains this code. In some ways, the block
diagram resembles a flowchart.
3.1 Front Panel
The front panel is the user interface of the VI. The Fig. 1
shows an example of a front panel. You build the front panel
with controls and indicators, which are the interactive input
and output terminals of the VI, respectively. The Fig. 1 shows
the front panel of Stenter Machine used in textile mills. The

__________________________________________________________________________________________
function of Stenter Machine is to stretch the cloth. The Fig. 1
shows the GUI of full Stenter Machine.
3.2 Block Diagram
After you build the front panel, you add code using graphical
representations of functions to control the front panel objects.
The block diagram contains this graphical source code. Front
panel objects appear as terminals on the block diagram. The VI
in Fig. 2 shows several primaries block diagram objects—
terminals, functions, and wires. Fig. 2 is also called as a back
panel, here the connections are made of the Stenter Machine.
The front panel operates only after giving proper connections
on back panel. If the connections are not made in back panel of
VI, the functioning and working will not be reflected on the
front panel.
3.3 Advantages of LabVIEW
 Graphical user interface.
 Drag-and-drop built in functions.
 Works on Multi platforms.
 Multiple high level development tools.
 Flexibility and scalability.
 Connectivity and instrument control.
 Simple application distribution.
 Open environment.
 Distributed development.
 Compiled languages for fast execution.
Fig 1 Front Panel in LabVIEW
Fig 2 Block Diagram in LabVIEW
4. DESIGN OF SYSTEM HARDWARE
This section gives the overview of the complete system
hardware. A general block diagram of the proposed system is
given in Fig. 3. It gives the general overview of the system
created and how it will operate.
The designed SCADA is for Stenter Machine and Printing
Machine which is widely used in textile mills. The simulation
created on LabVIEW is further implemented on a prototype of
a Stenter Machine. The control for the implemented machine
can be automatic or manual mode.
Fig 3 Proposed System Block Diagram
In automatic mode, the prototype of Stenter Machine is
operated by GUI designed on LabVIEW. The machine is
controlled by the computer and the data is logged and saved on
an excel file created on the computer. The system is made
secure by giving a password to the GUI. The machine’s data
logging and production page opens only after giving the
password. This helps the operator to keep the output safe from
others. The prototype of Stenter Machine can also be operated
manually. The Fig. 4 shows the manual operator panel. If there
is some fault in computer and the machine has to be operated,
one can switch over to manual mode. Even in the LabVIEW a
command is generated to switch to manual mode.

__________________________________________________________________________________________
Fig 4 Manual Operation Panel
These buttons will send command to the PLC and the
command from PLC will further operate the Stenter machine.
First is the manual start button. This button is connected to the
input pin of the PLC, which will accept the command from the
user. It will start the prototype of the Stenter machine. The
prototype will run as per the program in PLC. Second button is
for cycle stop. Whole system can be stopped by pressing it.
Similar is the function for emergency stop button. The only
difference is that emergency stop is on field operation. It
cannot be operated through SCADA system. But if this button
is pressed, the information will be sent to the operator using
SCADA. The operator will come to know when this button is
pressed. The forth button represents the alarm reset. If a fault
occurs, the alarm will ring (Fig. 4 fifth button), after clearing
the fault the operator has to reset the alarm. This resetting of
alarm is possible only if the fault is cleared. If the fault is not
cleared, the alarm will keep ringing and one cannot reset it.
This reset can be done on field only. The indication of alarm
and alarm reset is reflected on the SCADA system.
The last button is for resetting the production. If production for
a day is achieved but one does additional production, he may
remove the required batch and continue for another batch. At
this point of time he may not stop the machine, he can just
remove the batch from the end and keep another roller where
the other batch is rolled. When another batch starts he has to
reset the production count. This reset can be done just by
pressing the production reset button. These all buttons are
connected to the PLC and further connected to the prototype of
Stenter machine.
Fig. 5 shows the complete system hardware design. The
prototype of Stenter Machine consists of six 5V DC motors
which act as blowers of the Stenter Machine. These 5VDC
motors are powered by IC 7805. This IC converts the 24VDC
coming from the SMPS to 5VDC which prevents the motors
from blowing down. However 12V DC motor is used to run the
roller. This motor is powered by IC 7812 which will convert
the 24VDC coming from the SMPS to 12VDC. An Inductive
proximity sensor is used to sense the rotation of the roller. The
number of rotations is feedback to the LabVIEW which will
convert the number of rotation of the roller into how much
meters of cloth has been stretched. The prototype of Stenter
Machine is connected to LabVIEW based SCADA via PLC
and RS- 232 cable.
Fig 5 System Hardware Design
5. DESIGN OF SYSTEM SOFTWARE
Fig. 6 shows the complete Graphical User Interface designed in
LabVIEW 8.5. The first page shows the complete schematic
diagram of a Stenter Machine. The indicators will indicate all
the conditions of the machine. By turning the knob one can set
the values as per how much a cloth has to be stretched. The
remaining options will be set according to the set values
provided by the operator.
One can even keep the track of the temperature of each
chamber of Stenter Machine and the speed of each blower can
be set and recorded by this system. In our prototype we have
only taken the feedback for roller rotations.
Second page is to view each blower of the Stenter Machine. If
the temperature has to be maintained inside the chamber, the
blower of that chamber can be switched OFF by pressing just a
button on the front panel.
Similarly the third page is to monitor the amount of steam sent
into each chamber of the Stenter Machine. If the steam
required for specific chamber is different from the other, one
can set the speed of the exhaust fan.
Forth page is a GUI for Printing Machine. Printing Machine
has a conveyor belt where the cloth is placed. It has different
number of trolleys where colors are placed to be printed on the
cloth along with different patterns to be printed. The motor run
the conveyor belt. An encoder is placed on a roller which
would calculate the pulses to move the conveyor belt. At what

__________________________________________________________________________________________
speed a trolley of color should move, at what length of cloth
the printing should be done is given by the operator. According
to the given speed and length, it calculates the number of pulse
to be generated to move the conveyor belt. When all the
trolleys of different color and speed come to rest, the roller will
run the conveyor belt in forward direction. As the pulse count
stops, the conveyor belt will stop and reset to zero and the
trolleys will start moving.
Fifth page is a data logging page. Here data can be viewed for
minimum one second to maximum one day. It depends on the
operator to set the data logging time. The data will be
documented as per the difference of time specified by the
operator. This data is also stored in an Excel file created by the
user. Hence even if the data on LabVIEW is erased, one can
have a backup and one can view the data whenever required.
Sixth page is the communication page. The LabVIEW does not
calibrate with PLC unless its codes are created in LabVIEW.
Hence one cannot change the PLC whenever required. Each
PLC has different hex codes which have to be registered into
the LabVIEW. The string has to be decided according to the
communication protocol. Each PLC has different protocols and
addressing. People do not use LabVIEW for this reason. But
this problem acts as an advantage and makes the system
secured and safe.
The designed GUI is user friendly and informative. It provides
all the control actions to be taken at the operator end and
provides the operator with information regarding different
alarm situations. It also allows data logging and storage for
future referral. It communicates with the field controller (PLC)
through simple serial communication protocol RS-232 thereby
allowing less communication hardware to be used.
6. IMPLEMENTATION OF DESIGNED SYSTEM
In this system a Graphical User Interface, LabVIEW is being
used as a Supervisory Control and Data Acquisition System
(SCADA). It is a measuring software which is used here as a
SCADA. It is connected to PLC via RS-232 cable. The PLC
acts as an interface between the software and the prototype of a
textile machine, which is Stenter Machine.
6.1 Implementation Algorithm for Manual Operation
 Initialize SMPS (Switched Mode Power Supply).
 Provide connections between computer, SMPS, PLC
and prototype of Stenter Machine.
 Burn the ladder diagram created in WPLSoft 2.20 in
PLC.
 Operate manually by pressing the buttons, which is
indicated in Fig. 6, on the hardware to check whether
the connections are proper.
 Open the door of Stenter Machine to check and verify
alarm condition.
 Check all the conditions provided on Fig. 6 and verify
the working of the Stenter Machine.
Fig 6 Different Pages of the Designed GUI
6.2 Implementation Algorithm for Automatic
Operation
 Open the SCADA system created in LabVIEW 8.5.
 Initialise the path where the data has to store in
spreadsheet format.
 Start the process by pressing Auto Cycle ON. Before
pressing it note that the process is on Auto Mode and
not on Manual Mode.
 As the cycle starts check the Blower 1 and Blower 2
indicators on figure 6 1st
page of VI. Blower 1 will
start as the cycle starts and blower 2 will be ON after
4 seconds delay.
 Press Printing Machine button and check the
machine’s working.
 Again go to the first page and press data logging and
check the output.
 Again return to the main page and go to the results.

__________________________________________________________________________________________
 In results one can find the relationship between time
and production.
Fig. 7 represents a flowchart illustrating operational procedure
for the proposed system. The flowchart is the implementation
of the algorithm and working of our actual designed system.
Fig 7 Flowchart
7. RESULTS AND DISCUSSION
Fig. 8 shows the relationship between time in seconds and
number of rotation of the roller. It is clear that as the time rises
the roller at the output of the Stenter machine rotates and
therefore the number of rotations per second increases.
Fig. 9 shows the relation between time in seconds and
production in meters. The calculation needed to convert the
number of rotation into production is given by:
Production (meters) = Number of Rotations * 3.14 *Diameter
(user defined in mm).
The diameter here is user defined as the diameter of output
roller where cloth is wound may be different. This point has to
consider and accordingly how much meter cloth is needed at
the output should be recorded, known and monitored.
Fig. 10, the data log is created in the Excel file. It helps in
recalling the data and keep track on the production even after
the machine is stopped.
Fig 8 Graphical Representation of Time verses No. of Rotation
Fig 9 Graphical Representation of Time verses Production
(Meter)

__________________________________________________________________________________________
Fig. 10 Data Logging Stored in Excel File
Table 1 indicates different alarm situations occurring due to
some emergency situation or safety concerns. The design
provides feedback of the emergency situation at both the
manual operator panel and the SCADA. It also allows the
operator to rest the alarm from the SCADA and manual
operator panel. The manual panel is provided for on-site
control and over ride in emergency situations.
Table 1: Alarm Situations
8. CONCLUSIONS
The paper presents the design and implementation of SCADA
system using LabVIEW platform for small scale textile
industries. The designed SCADA is tested using prototype of
Stenter machine. The SCADA provides centralized monitoring
and supervisory control of the process. The stenter prototype
control is being implemented by a PLC field controller. The
PLC acts as RTU and communicates using serial
communication protocol with the designed SCADA. The
LabVIEW as a programming language offers flexibility in
design, making future up gradation less time consuming.
The designed HMI is user friendly which provides all the
necessary process information. The process feedback includes
the rate of production, operating hours, alarm situation and fail
safe condition. The designed system addresses the problem of
low cost automation for small scale industries. Many more
features such as network control, internet data logging, and
internet process control can be easily incorporated in the
designed system.
REFERENCES
[1]. A. Hace, K. Jezernik, Member, IEEE, ―Control System for
the Waterjet Cutting Machine‖, IEEE Transaction, Slovenian
Ministry of Education, Science and Technology under Grant
R55-3355, December 2003.
[2]. Nilima V. Warke, ―LabVIEW - Teaching Aid for Process
Control‖, ACEEE Int. J. on Control System and
Instrumentation, Vol. 03, No. 02, March 2012.
[3]. V. Lohith Kumar and S.Varsha, ―Design and Analysis of
Quality Control in Process Industries Using Labview‖, Int.
Journal of Engineering Research and Application Vol. 3, Issue
5, Sep-Oct 2013, pp.469-472.
[4]. Norashikin M. Thamrin and Mohd. Mukhlis Ismail,
―Development of Virtual Machine for Programmable Logic
Controller (PLC) by Using STEPS Programming Method‖,
IEEE International Conference on System Engineering and
Technology (ICSET), 2011
[5]. Yucel Ugurlu, Member, IEEE, Tatsuro Nagano, Y. Ugurlu
and Minato-ku, ―Project-Based Learning Using LabVIEW and
Embedded Hardware‖, IEEE 2011.
[6]. Naregalkar Akshay, K. Uday Sravanth, Rahul Varanasi
and J. Ankitha Reddy, ―Real Time Automated Control of
Industrial Processes with PLC –LABVIEW Communication‖,
International Journal for Research in Science & Advanced
Technologies, Volume-1, Issue-1, July- August 2012, pp 035-
038.
[7]. Rajesh Kurnar, Syed Akif Karnal, Furqan M. Khan,
―Designing And Implementing SCADA Subsystem for Textile
Industry‖, IEEE, 2004
Authors Biography
1. Mr. Nirmal Bharatia is a post- graduate
(Electronics) student at Mukesh Patel School of
Management and Engineering, SVKM’s NMIMS
University. He completed B.E. (E.E.) from
VNSGU. He has a work experience in core
electrical field for past 3 years.
2. Mr. N.D.Thakur is working as assistant professor
in Electronics & Telecommunication Engg.
Department of MPSTME, NMIMS, Mumbai. He
has completed B.E. (I.E.), M.Tech. (Electronics)
and M.B.A. (H.R.) and currently pursuing P.H.D.
in Electronics. He has more than 10 years of
academic experience and published several
papers in national and international journals. His
areas of interest are automation, process control
and biomedical signal processing.
Condition Alarm Cycle Start/
Stop
Cycle Start
without any fault
OFF Start
Normal Operating
Condition
OFF Start
Door of Stenter
machine Open
ON Stop
Trip Condition/
External Fault
ON Stop
Emergency Stop OFF Stop

Design and implementation of labview based scada for textile mills

More Related Content

What's hot (20)

Viewers also liked (20)

Similar to Design and implementation of labview based scada for textile mills (20)

More from eSAT Publishing House (20)

Recently uploaded (20)

Design and implementation of labview based scada for textile mills