This download link is referred from the post: PTU B.Tech 6th Semester Last 10 Years 2009-2019 Previous Question Papers|| Punjab Technical University
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| Roll No. | Total No. of Pages : 02 |
| Total No. of Questions : 09 |
B.Tech.(EIE) (2011 & Onwards E-I) (Sem.-6)
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PROGRAMMABLE LOGIC CONTROLLERS & APPLICATIONS
Subject Code : EI-310/DE-1.5
M.Code: 58040
Time: 3 Hrs.
Max. Marks : 60
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INSTRUCTION TO CANDIDATES :
- SECTION-A is COMPULSORY consisting of TEN questions carrying TWO marks each.
- SECTION-B contains FIVE questions carrying FIVE marks each and students have to attempt any FOUR questions.
- SECTION-C contains THREE questions carrying TEN marks each and students have to attempt any TWO questions.
SECTION-A
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Q1 Answer briefly :
- Differentiate between a PLC and a personal computer.
- The programmable controller operates in a real time. What does this mean?
- What are the most important factors in selecting the size of a PLC?
- What is the function of watchdog timer in a PLC?
- Name any four input and output devices suitable for the input and the output modules.
- What determines the maximum speed of transitions that a PLC counter can count? Why?
- What are the disadvantages of a PLC?
- What is the function of the internal control relay?
- What is a drum sequencer?
- Why do PLCs execute memory checking routines?
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SECTION-B
Q2. Explain the scan cycle of a PLC.
Q3. Write the ladder programs for the NAND, NOR and XOR logic functions.
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Q4. Draw the schematic diagram of the dc input module and explain each section.
Q5. Develop a sequencer control system to operate a basic two-axis robot.
Q6. Explain the various timers and counters available in a PLC.
SECTION-C
Q7 a) Explain the memory organization of a PLC. Name the different types of data files. 5
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b) Make a sequential function chart and write a ladder program for following the operation of a start switch (S1), after which the tank is filled by opening a valve (V1) until a level switch (L1) is triggered, then the tank is drained by opening drain valve (V2) until level switch (L2) is triggered, then the sequence is repeated. 5
Q8 a) Draw the schematic diagram of an output module. How the high rating devices are interfaced with the output module in a PLC. 5
b) Write a ladder program to implement the following process. When the lights are turned off in a building, an exit door light is to remain on for an additional 2 min time and the parking lot lights are to remain on for an additional 3 min after the door light goes out. 5
Q9. (a) How the analog devices are interfaced with a PLC? 3
(b) What do mean by latching? Draw the ladder program for the start stop of a motor. 2
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(c) Explain how the proportional, integral and derivative control is implemented with a PLC. 5
NOTE : Disclosure of identity by writing mobile number or making passing request on any page of Answer sheet will lead to UMC case against the Student.
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This download link is referred from the post: PTU B.Tech 6th Semester Last 10 Years 2009-2019 Previous Question Papers|| Punjab Technical University