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    Reg No.: - Name: - : Marks

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    Glan Devadhas
    This document contains the questions from a B.Tech degree examination on Logic and Distributed Control Systems. It has three parts with multiple choice and long answer questions. Part A contains two 15 mark questions on PLC architecture, components, and programming. Part B has two 15 mark questions about DDC and SCADA system architecture. Part C includes two 20 mark questions regarding operator interfaces, safety systems, and display hierarchy in distributed control systems.

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    Reg No.: - Name: - : Marks

    Uploaded by

    Glan Devadhas
    33 views2 pages
    This document contains the questions from a B.Tech degree examination on Logic and Distributed Control Systems. It has three parts with multiple choice and long answer questions. Part A contains two 15 mark questions on PLC architecture, components, and programming. Part B has two 15 mark questions about DDC and SCADA system architecture. Part C includes two 20 mark questions regarding operator interfaces, safety systems, and display hierarchy in distributed control systems.

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    AE401-C

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    This document contains the questions from a B.Tech degree examination on Logic and Distributed Control Systems. It has three parts with multiple choice and long answer questions. Part A contains two 15 mark questions on PLC architecture, components, and programming. Part B has two 15 mark questions about DDC and SCADA system architecture. Part C includes two 20 mark questions regarding operator interfaces, safety systems, and display hierarchy in distributed control systems.

    Copyright:

    © All Rights Reserved
    Download as PDF, TXT or read online from Scribd
    Download as pdf or txt
    33 views2 pages

    Reg No.: - Name: - : Marks

    Uploaded by

    Glan Devadhas
    This document contains the questions from a B.Tech degree examination on Logic and Distributed Control Systems. It has three parts with multiple choice and long answer questions. Part A contains two 15 mark questions on PLC architecture, components, and programming. Part B has two 15 mark questions about DDC and SCADA system architecture. Part C includes two 20 mark questions regarding operator interfaces, safety systems, and display hierarchy in distributed control systems.

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    A G192001 Pages:2

    Reg No.:_______________ Name:__________________________

    APJ ABDUL KALAM TECHNOLOGICAL UNIVERSITY


    SEVENTH SEMESTER B.TECH DEGREE EXAMINATION(R&S), DECEMBER 2019
    Course Code: AE401
    Course Name: LOGIC & DISTRIBUTED CONTROL SYSTEM
    Max. Marks: 100 Duration: 3 Hours

    PART A
    Answer any two full questions, each carries 15 marks. Marks

    1 a) With a neat block diagram explain the architecture of a PLC device. (10)
    b) What are PLCs? List and explain advantages of using a PLC device. (5)

    2 a) Write the different program control instructions in PLC. (10)


    b) Write a PLC ladder program to operate 3 motors M1,M2 and M3 according to (5)
    the following conditions of switches S1,S2 and S3
    When any one of the switches are ON M1 is ON.
    When any two of the switches are ON M2 is ON.
    When all the three switches are ON M3 is ON. And only one motor should work
    at a time.

    3 a) Explain the working of ‘timers’ and ‘counters’ in PLCs. (8)


    b) What is frame structure of Modbus RTU? Briefly explain each term in frame (5)
    structure diagram.
    c) Explain any one math instruction in PLC with example. (2)

    PART B
    Answer any two full questions, each carries 15 marks.
    4 a) With neat diagram, explain the architecture of a DDC system. (7)
    b) With a neat diagram, explain the architecture and basic functions of a SCADA (8)
    system.

    5 a) With a neat diagram, illustrate the architecture of a DCS. (10)


    b) Compare the different architectures used in development of DCS device. (5)

    Page 1of 2
    A G192001 Pages:2

    6 a) What is meant by supervisory control? Explain with a block diagram. (7)


    b) Explain the significance of automation pyramid in DCS system. (5)
    c) What are LCUs? Explain its significance. (3)

    PART C
    Answer any two full questions, each carries 20 marks.
    7 a) List and explain the various functions of a operator interface in a DCS. (10)
    b) Enumerate the guideline for human factor in designing operator interface of DCS. (5)
    c) Define the significance of low level operator interface (LLOI) in DCS. Explain (5)
    any one LLOI.
    8 a) Write notes on (8)
    i) PHA
    ii) HaZOp
    b) Draw and explain the architecture of safety instrument system with neat diagram. (7)
    c) Define risk. Write notes on risk management. (5)

    9 a) Explain the levels of display hierarchy used in DCS. (10)


    b) Define the term safety life cycle. (5)
    c) Write notes on application of safety systems. (5)
    ****

    Page 2of 2

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