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    PLC - Revision

    Uploaded by

    sabri Wan Ibrahim
    The document contains instructions and questions regarding ladder logic diagrams and Programmable Logic Controllers (PLCs). It asks the reader to: 1) Complete tables by writing mnemonic codes and data based on given ladder logic diagrams. 2) Modify timer data in a ladder logic diagram so that a safety siren operates 30 seconds after a pilot lamp lights up. 3) Identify mnemonic codes and data, and state reasons why an alarm may function earlier than a warning light, based on a ladder logic diagram. 4) Complete a table with mnemonic codes and data, and state two reasons why an automatic school gate may not close after 30 seconds, based on another ladder logic diagram.

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    © All Rights Reserved
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    PLC - Revision

    Uploaded by

    sabri Wan Ibrahim
    255 views5 pages
    The document contains instructions and questions regarding ladder logic diagrams and Programmable Logic Controllers (PLCs). It asks the reader to: 1) Complete tables by writing mnemonic codes and data based on given ladder logic diagrams. 2) Modify timer data in a ladder logic diagram so that a safety siren operates 30 seconds after a pilot lamp lights up. 3) Identify mnemonic codes and data, and state reasons why an alarm may function earlier than a warning light, based on a ladder logic diagram. 4) Complete a table with mnemonic codes and data, and state two reasons why an automatic school gate may not close after 30 seconds, based on another ladder logic diagram.

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    Original Title

    PLC - REVISION

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    The document contains instructions and questions regarding ladder logic diagrams and Programmable Logic Controllers (PLCs). It asks the reader to: 1) Complete tables by writing mnemonic codes and data based on given ladder logic diagrams. 2) Modify timer data in a ladder logic diagram so that a safety siren operates 30 seconds after a pilot lamp lights up. 3) Identify mnemonic codes and data, and state reasons why an alarm may function earlier than a warning light, based on a ladder logic diagram. 4) Complete a table with mnemonic codes and data, and state two reasons why an automatic school gate may not close after 30 seconds, based on another ladder logic diagram.

    Copyright:

    © All Rights Reserved
    Download as DOC, PDF, TXT or read online from Scribd
    Download as doc, pdf, or txt
    255 views5 pages

    PLC - Revision

    Uploaded by

    sabri Wan Ibrahim
    The document contains instructions and questions regarding ladder logic diagrams and Programmable Logic Controllers (PLCs). It asks the reader to: 1) Complete tables by writing mnemonic codes and data based on given ladder logic diagrams. 2) Modify timer data in a ladder logic diagram so that a safety siren operates 30 seconds after a pilot lamp lights up. 3) Identify mnemonic codes and data, and state reasons why an alarm may function earlier than a warning light, based on a ladder logic diagram. 4) Complete a table with mnemonic codes and data, and state two reasons why an automatic school gate may not close after 30 seconds, based on another ladder logic diagram.

    Copyright:

    © All Rights Reserved
    Download as DOC, PDF, TXT or read online from Scribd
    Download as doc, pdf, or txt
    of 5

    PLC - SMART REVISION

    PRE - MID-YEAR 2009

    1. Complete the table by writing mnemonic code and correct data.

    Mnemonic code Data

    Mnemonic code Data

    1
    1.(a) Rajah 1 menunjukkan gambar rajah tangga Pengawal Logik Boleh Aturcara.
    Figure 1 shows a ladder diagram for a Programmable Logic Controller.

    Rajah 1 Figure 1

    Berdasarkan Rajah 1, lengkapkan Jadual 1 dengan menulis arahan kod senang ingat.
    Based on Figure 1, complete Table 1 by writing mnemonic code instruction.

    Gunakan Lampiran 1 untuk menjawab soalan ini.


    Use Appendix 1 to answer these questions.

    1.(b) Jadual 2 menunjukkan kod senang ingat untuk satu Pengawal Logik Boleh Aturcara.
    Table 2 shows mnemonic code for a Programmable Logic Controller.

    Jadual 2 Table 2

    Kod senang ingat Mnemonic Code Data


    LDNOT 00004
    LD 00007
    OR 01004
    ANDLD
    OUT 01004
    END

    Berdasarkan Jadual 2, lakar dan labelkan gambar rajah tangga yang setara.
    Based on Table 2, sketch and label the equivalent ladder diagram.

    Gunakan Lampiran 2 untuk menjawab soalan ini.


    Use Appendix 2 to answer these questions.

    2
    2. Figure shows a ladder diagram of a safety control system that uses a Programmable
    Logic Controller. The siren will function 10 seconds after the sensor switch has been
    activated.

    (a) Berdasarkan Rajah 1, lengkapkan Jadual 1 dengan menulis :


    Based on Figure 1, complete Table 1 by writing:
    (i) Arahan kod senang-ingat
    Mnemonic code instruction

    (ii) Data yang betul


    Correct data

    (b) Ubahsuai data pemasa TIM000 supaya siren keselamatan dapat beroperasi selepas 30
    saat lampu pandu bernyala. Gunakan ruang diberi dalam Lampiran 1.
    Modify timer data TIM000, so that the safety siren operates 30 seconds after
    pilot lamp is lighted. Use space given in Appendix 1.

    3
    3. Figure 1 shows a ladder diagram of a safety alarm system that uses a
    Programmable Logic Controller. The alarm will be activated 10 seconds after the
    warning light comes on.

    a) Based on the figure, write ;

    i) the mnemonic codes


    ii) the correct data

    b) When the sensor switch 00000 is activated, the alarm functions earlier than the
    warning light 01001.

    State two reason why this occurs.

    4
    1. Figure 1 shows a ladder diagram of a control system that uses a Programmable
    Logic Controller to automatic control the school gate door. The gate will close
    after 30 seconds swich start is on.

    00000 00001 01001


    01000

    01000

    01000
    TIM 001 Key :
    # 0300 Petunjuk:
    00002 00003 I/O Components
    Komponen
    01001 00000 Switch (stop)
    01001 Suis (henti)
    00001 Switch (start)
    Suis (mula)
    TIM 001 00002 Test Switch
    Suis uji
    00003 Fuse
    Fius
    END 01000 Pilot lamp
    Lampu pandu
    01001 Motor (gate)
    Motor (pagar)
    (a) Refering to figure 1, complete Table 1 in Appendix A by writing:
    Merujuk Rajah 1, lengkapkan Jadual 1 di lampiran A dengan menulis:

    (i) Mnemonic code


    Kod senang – ingat

    (ii) Correct data


    Data yang betul

    (b) The gate door does not close automatically after 30 seconds.
    Pintu gate tidak tertutup secara automatic setelah 30 saat.

    State two reasons why this fault may have occurred


    Nyatakan dua sebab mengapa kerosakan ini boleh berlaku.

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