Download GTU (Gujarat Technological University) BE/BTech (Bachelor of Engineering / Bachelor of Technology) 2017 Winter 8th Sem Old 182001 Programmable Logic Controller Previous Question Paper
Seat No.: ________ Enrolment No.___________
GUJARAT TECHNOLOGICAL UNIVERSITY
BE ? SEMESTER VIII(OLD) ? EXAMINATION ? WINTER 2017
Subject Code:182001 Date: 10-11-2017
Subject Name: Programmable Logic Controller
Time: 02:30 pm to 05:00 pm Total Marks: 70
Instructions:
1. Attempt all questions.
2. Make suitable assumptions wherever necessary.
3. Figures to the right indicate full marks.
Q.1 (a) Draw the basic hardware block diagram interfaced with PLC. Explain each
block.
07
(b) List out different timer instructions in PLC and explain any two of them with
timing diagrams.
07
Q.2 (a) Show various kinds of connections of PLC with remote input /output modules. 07
(b) What is cycle time of PLC. Describe the PLC continous updating procedure.
Which are different factors on which cycle time depends on?
07
OR
(b) Draw the functional logic diagram for (A.B + C) E. = Q and draw ladder
diagram for it.
07
Q.3 (a) What is the sequential functional chart (SFC)? Explain it with washing
machine operation example.
07
(b) What is Master Control Relay? With a drawing explain the principle of using
MCR in a ladder.
07
OR
Q.3 (a) Describe the various types of Jump instructions. 07
(b) Draw and explain closed loop control of any process using PLC. 07
Q.4 (a) Which are different types of timers. Explain operation of each with timing
diagram.
07
(b) Draw SFC and ladder diagram for traffic light sequence operation. 07
OR
Q.4 (a) Consider the problem of the control of a machine which is required to direct 6
tins along one path for packaging in a box and then 12 tins along another path
for packaging in another box (Figure 1). A deflector plate might be controlled
by a photocell sensor which gives an output every time a tin passes it.Write a
ladder programme to execute this task automatically using PLC.
07
(b) Write a detailed note on arithmetic functions of PLC 07
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Seat No.: ________ Enrolment No.___________
GUJARAT TECHNOLOGICAL UNIVERSITY
BE ? SEMESTER VIII(OLD) ? EXAMINATION ? WINTER 2017
Subject Code:182001 Date: 10-11-2017
Subject Name: Programmable Logic Controller
Time: 02:30 pm to 05:00 pm Total Marks: 70
Instructions:
1. Attempt all questions.
2. Make suitable assumptions wherever necessary.
3. Figures to the right indicate full marks.
Q.1 (a) Draw the basic hardware block diagram interfaced with PLC. Explain each
block.
07
(b) List out different timer instructions in PLC and explain any two of them with
timing diagrams.
07
Q.2 (a) Show various kinds of connections of PLC with remote input /output modules. 07
(b) What is cycle time of PLC. Describe the PLC continous updating procedure.
Which are different factors on which cycle time depends on?
07
OR
(b) Draw the functional logic diagram for (A.B + C) E. = Q and draw ladder
diagram for it.
07
Q.3 (a) What is the sequential functional chart (SFC)? Explain it with washing
machine operation example.
07
(b) What is Master Control Relay? With a drawing explain the principle of using
MCR in a ladder.
07
OR
Q.3 (a) Describe the various types of Jump instructions. 07
(b) Draw and explain closed loop control of any process using PLC. 07
Q.4 (a) Which are different types of timers. Explain operation of each with timing
diagram.
07
(b) Draw SFC and ladder diagram for traffic light sequence operation. 07
OR
Q.4 (a) Consider the problem of the control of a machine which is required to direct 6
tins along one path for packaging in a box and then 12 tins along another path
for packaging in another box (Figure 1). A deflector plate might be controlled
by a photocell sensor which gives an output every time a tin passes it.Write a
ladder programme to execute this task automatically using PLC.
07
(b) Write a detailed note on arithmetic functions of PLC 07
2
Q.5 (a) Draw the ladder diagram of four basic Digital logic Gates. Convert each Gate
ladder into Instruction list programming.
07
(b) Explain any three types of input and output devices with their wiring
connections to PLC.
07
OR
Q.5 (a) A 10-bit bipolar analog input has an input range of -5 to +5 volts. If the
converter outputs the binary number 01101111012 what is the voltage being
read?
07
(b) Explain fail safe connection of start and stop switches with PLC with suitable
wiring and ladder diagram.
07
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This post was last modified on 20 February 2020