SPPU Electronics and Telecom Engineering (Semester 7)
PLCs and Automation
December 2016
Total marks: --
Total time: --
(1) Assume appropriate data and state your reasons
(2) Marks are given to the right of every question
(3) Draw neat diagrams wherever necessary

Solve any one question from Q.1 & Q.2(a,b)
1 Draw the architecture of Automation and discuss its advantages & limitations.
8 M

2(a) Explain the impact of Automation on society.
4 M
2(b) Explain how Automation system improve industrial profitability.
4 M

Solve any one question from Q.3 & Q.4
3 A measurement of temperature using a sensor that outputs 6.5mv/°C must measure to 100°C. A6-bit ADC with a 10V reference is used.
a) Develop a circuit to interface the sensor and the ADC.
b) Find the temperature resolution.
6 M

4 What is Linearization? Explain different approaches for linearization.
6 M

Solve any one question from Q.5 & Q.6
5 Explain microprocessor based flow control system.
6 M

6 Explain role of servomotors in automation.
6 M

Solve any one question from Q.7(a,b) & Q.8
7(a) Exlain following term w.r.t. PLC
i) I/O scan mode
ii) Execution mode
iii) Scan time
v) Soft PLC.
8 M
7(b) Draw and explain bottle filling plant. construct Ladder diagram for the same.
10 M

8 Write a short note on
a) IEC 6 1 1 3 1
ii) Networking of PLC
iii) RFID
18 M

Solve any one question from Q.9(a,b) & Q.10(a,b)
9(a) What is SCADA. Explain the functions of Master Terminal unit in detail.
8 M
9(b) Explain elements of DCS with block diagram.
8 M

10(a) What are the characteristics of processes make them potential candidate for SCADA?
8 M
10(b) Explain any two specifications of DCS in detail.
8 M

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