SPPU Electronics and Telecom Engineering (Semester 7)
PLCs and Automation
December 2016
Total marks: --
Total time: --
INSTRUCTIONS
(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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