Pune University BE Electrical PLC and SCADA Applications Question Papers

Pune University BE Electrical PLC and SCADA Applications Question


B.E. (Electrical) PLC AND SCADA APPLICATIONS (2008 Pattern) (Sem. – I)

Time : 3 Hours]                                                                                            [Max. Marks : 100

Instructions to the candidates:

1)         Answer any one question from each pair of questions Q. 1 and Q. 2, Q. 3 and Q.4, Q. 5 and Q. 6, Q. 7 and Q. 8, Q. 9 and Q. 10, Q. 11 and Q. 12.

2)         Answers to the two sections should be written in separate books.

3)          Neat diagrams must be drawn wherever necessary.

4)          Pigures to the right indicate full marks.


QI) a) Define PLC and explain how it is helpful in automated process.                     [6]

b)        State and explain advantages and disadvantages of PLC in detail.            [8]

c)        Explain brief history of PLC along with some important names.               [4]


Q2) a) Draw and explain the main block diagram of PLC.                                           [8]

b)        State some applications of PLC.                                                                       [5]

c)        Write a short note on input module.                                                                 [5]

Q3) a) Explain the rules for constructing the ladder diagram.                                      [8]

b)         Draw the ladder diagram for the following function table.                        [8] Inputs – II, 12 Outputs – QI, Q2, Q3, Q4

II I2 Qi Q2 Q3 Q4
0 0 I I I I
0 I 0 0 0 0
I 0 0 0 0 0


Q4) a) Explain Input ON/OFF and analog devices in detail.                                        [8]

b) Explain Output ON/OFF and analog devices in detail.                                 [8]

Q5) a) Draw and explain block diagram of PID control using PLC.                           [8]

b) Explain ‘adjust and Observe’ tuning method.                                                 [8]


Q6) a) Draw and explain AC motor starter.                                                                     [8]

b) Explain speed control of DC motor with DC source.                                     [8]


Q7) a) Define SCADA.                                                                                                       [4]

b)        Draw and explain SCADA architecture in detail.                                      [10]

c)         State applications of SCADA.                                                                         [4]


Q8) a) Explain :                                                                                                                     [9]

i)             Human Machine Interface.

ii)           Master Terminal Unit.

iii)        Remote Terminal Unit.

b) Explain advantages and disadvantages of SCADA systems.                       [9]

Q9) a) Explain first, second and third generations of SCADA architecture.             [8]

b) Write a short note on Energy Management System.                                      [8]


QI 0) Write short notes on SCADA system used in :

a)        Petroleum Refining Process.                                                                            [8]

b)        Water Purification System.                                                                              [8]

QII) a) Explain DNP3 protocol.                                                                                         [8]

b) What are Open Systems Interconnection protocols?                                     [8]


Q12) a) Explain relationship among CIP and other protocols.                                     [8]

b) Explain Control Net protocol.                                                                            [8]

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