Download PTU B-Tech EEE 2020 Dec 7th Sem 74092 Microcontroller And Plc Question Paper

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Total No. of Pages : 02
Total No. of Questions : 18

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B.Tech.(EE) PT (Sem.=7)

MICROCONTROLLER AND PLC
Subject Code : BTEE-604
M.Code : 74092
Time : 3 Hrs. Max. Marks : 60

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INSTRUCTIONS TO CANDIDATES :

1. SECTION-A is COMPULSORY consisting of TEN questions carrying TWO marks each.
2. SECTION-B contains FIVE questions carrying FIVE marks each and students have to attempt any FOUR questions.
3. SECTION-C contains THREE questions carrying TEN marks each and students have to attempt any TWO questions.

SECTION-A

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Answer briefly :

1. Give any two differences between a microprocessor and a microcontroller.
2. List out the Features of 8051 Microcontroller?
3. What is a program counter?
4. What is a stack pointer?

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5. List some 8051 Microcontroller applications in embedded systems?
6. Define clock cycle.
7. Define machine cycle:
8. What do you mean by serial data transmission?
9. Differentiate between PLC and hardwired system.

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10. Implement AND gate using ladder logic programming.

SECTION-B

11. With the help of a suitable diagram explain the architecture of 8051 microcontroller.
12. Write a program to transfer value 41H serially (one bit at a time) via pin P2.1. Put two highs at the start and end of the data. Send the byte LSB first.
13. Write a program to find the number of zeros in register R2.

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14. Explain how LCDs and keyboards can be interfaced with 8051 microcontroller?
15. Develop a ladder logic that will allow three switches in a room to control a single light.

SECTION-C

16. a) What is an interrupt? List various types of interrupts available in 8051 Microcontroller?
    b) Write a short note on “RAM allocation in 8051 microcontroller”.

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17. a) Explain Program Status Word (PSW) special function register.
    b) Write a short note on PLDs and FPGA.
18. Draw the block diagram of a programmable logic controller and explain each block in detail.

NOTE : Disclosure of Identity by writing Mobile No. or Making of passing request on any page of Answer Sheet will lead to UMC against the Student.

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