What is SCADA (Supervisory Control And Data Acquisition)


Supervisory Control And Data Acquisition

What is SCADA?

It is supervisory control and data
acquisition in which automation is done from remote locations. It is partial
controller it is always used with PLC,
which is main controller.
PLC is located on the site but with the help
of SCADA we can monitor and give command to the PLC.

Why do we use SCADA in automation? 

In PLC we cant see the actual process
ongoing in the industry for that SCADA is used in which we get animated view of
that process. Using SCADA we can supervise as well as control the process.

Advantages of SCADA: 

1.  Increase in productivity.
2.  Improves quality.
3.  Increase in safety.
4.  Flexibility.
5.  Increasing efficiency.
6.  It is
versatile.

Elements of SCADA:


            1)  Object
2) Properties
3) Tags
 Object: –
In SCADA we need some shapes to represent
the actual machines
e.g.tanks, pipes, boilers, lamps etc these
primary shapes are called as
object.
Properties:
Once an object is taken then we have to give
it a property e.g. if we are
representing tank by an object then we need
to give percent filling
property to it. If we need to move any object
then location property must
be
given to it.



 Tag:

Tag means giving the unique name to that
object so that we can identify
that
object and give it respective commands. There are three different types of tags
that are: –
Memory tag (user defined):-
1.  Memory
discrete
2.  Memory
real
3.  Memory
integer
4.  Memory
string
IO tag (user or any other sw defined): –
1.  IO
discrete
2.  IO real
3.  IO
integer
4.  IO
string
System tag (system defined): –

Features of SCADA: 

 

§  Animation creation
§   Scripting
§   Excel linking
§   Alarms
§   Security
§   Trend
§   Recipe
management
§    PLC
communication
§    Networking

SOFTWARES
USED FOR SCADA: 

 

Software used in SCADA

 

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