Supervisory control and data acquisition (SCADA) is a control system architecture comprising computers, networked data communications and graphical user interfaces(GUI) for high-level process supervisory management, while also comprising other peripheral devices like programmable logic controllers (PLC) and discrete proportional-integral-derivative (PID) controllers to interface with process plant or machinery. The use of SCADA has been considered also for management and operations of project-driven-process in construction.

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2. SCADA
•SCADA stands for Supervisory Control And Data Acquisition
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3. NEED OF SCADA
• Previously without SCADA an industrial process was entirely controlled by PLC, PID and
Micro controllers.
• These codes were either written in assembly language or relay logic without any true
animation that would explain the process running.
• Thus to make the understanding of process easily with the help of true animation
SCADA came into existence.
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4. BLOCK DIAGRAM
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5. APPLICATIONS OF SCADA
• SCADA systems are used for monitoring a variety of data like flows, currents, voltages,
pressures, temperatures, water levels, etc., In various industries. If the system detects any
abnormal conditions from any monitoring data, then the alarms at the central or remote sites
will be triggered for alerting the operators through HMI.
• There are numerous applications of SCADA systems, but a few most frequently used SCADA
applications include:
• Manufacturing industries
• Wastewater treatment and distribution plants
• SCADA in power system
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6. WHAT IS SCADA?
• It works like a supervisor who supervises the entire plant area, if needed it also controls the
process values I.E. Level, pressure, temperature, etc.
• From a distance place if we want to run the process i.E starting, stopping, opening and
closing of field instruments as well as logging the various values. Scada can do for you.
• Scada is not a controller it is just a software which must be linked with controller ultimately it
is to be connected to plc/dcs system which in turn connected to filed instruments.
• Hazardous areas, unhygienic places, etc where a person can't be sent regularly but process
has to be monitored continuously or it should be controlled then it can be done using scada.
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7. FEATURES OF SCADA
• DYNAMIC REPRESENTATION
• DATABASE CONNECTIVITY
• DEVICE CONNECTIVITY
• ALARMS
• TRENDS
• SECUIRITY
• NETWORKING
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8. DYNAMIC REPRESENTATION
• This feature explains about the representaion of various symbols of field instruments
which are present in tool liabrary which can be utilized in scada application.
• Scada is not dedicated to any specific industry hence its library is so large that you can
use it for any industries available.
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9. DATABASE CONNECTIVITY
• Scada doesn't have its own database just like microsoft. Hence for storage it depends on
database available in the market.
• It can be connected to vb, sql, excel or sap.
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10. DEVICE CONNECTIVITY
• Scada is not a controller i.e its alone can’t run process. It can be connected to any PLC
or DCS.
• Hence any plc or DCS that are available in the market by using specific driver software it
can be connected.
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11. ALARMS
• Generally alarms are implemented by indicating lamps or hooter in the field but scada
represents it with a format.
• In the field area alarms are generated for warning or to keep the process between
certain limits.
• The format consists of date, time, status, priorities, many such elements which can be
used for generation of reports.
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13. TRENDS
• These are also called the xy plotters or data loggers. Basically it represents the values
in wave formats. It is one of the important feature of scada.
• It plots the values with reference to time.
• Trend is subdivided into real time and historical trends. I.E. We can see the present
values of the process as well past values and can be stored and records for analysis.
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15. SECURITY
• Every application must be secured from unauthorized users by different security levels.
• In SCADA, this security can be given as whole as well as individually.
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16. NETWORKING
• It explains that we can share scada application on LAN or internet as well as exchange
of data is possible.
• Many networking protocols are supported by SCADA software.
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17. COST ANALYSIS
• Cost of scada is decided by number of tags or number of screens.
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18. TAG NAMES AND TAG TYPES
• Every symbol used in software must be specific tag name.
• The logical name given to any symbol is said to be tag name.
• Tag typed defines the symbol category. It may be discrete and analog.
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19. THANK YOU
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