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logic and sistibuted control system, Assignments of Logic

Saveetha Institute of Medical and Technical SciencesLogic

question and answer for the above details. the answer should be correct and answer it with in time. instrumentation students can able to answer this .

Typology: Assignments

2019/2020

Uploaded on 08/27/2020

mr-m-arivalagan
mr-m-arivalagan 🇮🇳

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Saveetha Nagar, Thandalam, Chennai – 602105
CIA II – March - 2020 (Set 2)
Degree / Branch / Sem: BE/EIE/VI
Sub. Code / Name / Total Marks: EI8651-LOGIC AND DISTRIBUTED
CONTROL SYSTEM /50
PART – A 05X02 =
10
1. What the jump to subroutine instruction allows the program to do?
2. List basic math functions that can be performed on PLCs.
3. When are the immediate input and immediate output instructions used?
4. Distinguish between structured text programming and Ladder programming.
5. List some structured text operators.
PART –B 02X13 = 26
6. (a) Explain program control instructions with suitable case study.
(or)
6. (b) A conveyor is supposed to have exactly 45 parts on it. Three indicating lights used to
indicate the conveyor count status: less than 45, yellow; exactly 45, green: and more than 45, red.
The count of parts on the conveyor is set at 45 each morning by an actual count of
parts. There are two sensors on the conveyor. One is actuated by parts entering the conveyor, and
the other is actuated by parts leaving. Develop a PLC program using compare functions.
7. (a) Write a FBD program to turn on a process pump, 2 seconds after the outlet valve on the
pump has been opened by PLC output Q124.3. In this application, assume that the pump starter
relay is connected to PLC output address Q124.4 and assume that internal bit B3/4 is used to stop
the pump.
(or)
7.b) Write a program to operate a light according to the following sequence:
• A momentary pushbutton is pressed to start the sequence.
• The light is switched on and remains on for 2 s.
• The light is then switched off and remains off for 2 s.
• A counter is incremented by 1 after this sequence.
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Saveetha Nagar, Thandalam, Chennai – 602105

CIA II – March - 2020 (Set 2)

Degree / Branch / Sem: BE/EIE/VI

Sub. Code / Name / Total Marks: EI8651-LOGIC AND DISTRIBUTED

CONTROL SYSTEM /

PART – A 05X02 =

1. What the jump to subroutine instruction allows the program to do?

2. List basic math functions that can be performed on PLCs.

3. When are the immediate input and immediate output instructions used?

4. Distinguish between structured text programming and Ladder programming.

5. List some structured text operators.

PART –B 02X13 = 26

6. (a) Explain program control instructions with suitable case study.

(or)

6. (b) A conveyor is supposed to have exactly 45 parts on it. Three indicating lights used to

indicate the conveyor count status: less than 45, yellow; exactly 45, green: and more than 45, red.

The count of parts on the conveyor is set at 45 each morning by an actual count of

parts. There are two sensors on the conveyor. One is actuated by parts entering the conveyor, and

the other is actuated by parts leaving. Develop a PLC program using compare functions.

7. (a) Write a FBD program to turn on a process pump, 2 seconds after the outlet valve on the

pump has been opened by PLC output Q124.3. In this application, assume that the pump starter

relay is connected to PLC output address Q124.4 and assume that internal bit B3/4 is used to stop

the pump.

(or)

7.b) Write a program to operate a light according to the following sequence:

• A momentary pushbutton is pressed to start the sequence.

• The light is switched on and remains on for 2 s.

• The light is then switched off and remains off for 2 s.

• A counter is incremented by 1 after this sequence.

  • The sequence then repeats for a total of 4 counts.
  • After the fourth count, the sequence will stop and the counter will be reset to zero

PART –C (Case Study/Applications) 01X14 = 14

8)a) A main conveyor has two conveyors, A and B, feeding it. Feeder conveyor A

puts six-packs of canned soda on the main conveyor. Feeder conveyor B puts eight-packs of canned soda on the main conveyor. Both feeder conveyors have counters that count the number of packs leaving them. Construct a PLC program to give a total can count on the main conveyor.

(or)

8b) Write a program to implement the process illustrated in Figure 7-46. The

sequence of operation is to be as follows:

  • Normally open start and normally closed stop pushbuttons are used to start and stop the process.
  • When the start button is pressed, solenoid A energizes to start filling the tank.
  • As the tank fills, the empty level sensor switchcloses.
  • When the tank is full, the full level sensor switch closes
  • Solenoid A is de-energized.
  • The agitate motor starts automatically and runs for 3 min to mix the liquid.
  • When the agitate motor stops, solenoid B is energized to empty the tank.
  • When the tank is completely empty, the empty sensor switch opens to de- energize solenoid B.
  • The start button is pressed to repeat the sequence Course Outcomes– After successful Completion of the Course, the Students should be able to EI202. 1 To give an overview of the automation technologies such as PLCs, SCADA and DCS used in industries. EI202. 2 To provide a fundamental understanding of the different languages used for PLC Programming EI202. 3

To provide insight into some of the advanced principles those are

evolving for present

and future automation

Knowledge Level (Blooms Taxonomy) K 1 Remembering (Knowledge)

K

Understanding (Comprehension)

K

Applying (Application of Knowledge) K 4 Analysing (Analysis)

K

Evaluating (Evaluation)

K

Creating (Synthesis) Part Part – A