Exam Details

Subject programmable logic controllers and applications
Paper
Exam / Course b.tech
Department
Organization Vardhaman College Of Engineering
Position
Exam Date June, 2017
City, State telangana, hyderabad


Question Paper

Hall Ticket No:
Question Paper Code B3360
(AUTONOMOUS) M. Tech II Semester Supplementary Examinations, June 2017
(Regulations: VCE-R15) PROGRAMMABLE LOGIC CONTROLLERS AND APPLICATIONS
(Power Electronics and Electric Drives) Date: 16 June, 2017 FN
Time: 3 hours
Max Marks: 70
Answer any FIVE Questions
Each Question carries equal marks
1.
Explain role and operation of I/O modules in a PLC system.
7M
What are the advantages and disadvantages of a PLC?
7M
2.
Explain the difference between legal (proper) and illegal (improper) PLC Ladder Programming Layouts.
7M
Explain the procedural steps involved in Drill press operation. Draw the Ladder diagram for drill press control.
7M
3.
Explain how various basic digital logic gates can be implemented through contact and coil logic in PLC.
7M
Discuss about Ladder diagrams and sequence listings.
7M
4.
List the five major types of registers. Use a block diagram to show where each type fits into the PLC scheme of operation.
7M
Design construct and test PLC circuits for the following process: A fan, is to be turned on when count L goes from 7 down to 0 and when either count M goes up to 14 or count N has not gone all the way from 14 down to 0. One switch or stop button resets the entire process.
7M
5.
Explain Retentive and off delay timers of the PLC with necessary timing diagrams.
7M
When a large motor is started, a lubrication pump for the bearings of the large motor is also started. When the large motor is switched off, it is desired that lubrication pump should continue to run for 40 seconds more. Draw a ladder Diagram to implement this scheme.
7M
6.
Explain how JUMP instruction is differ from SKIP and Master Control Relay functions.
7M
Explain following PLC functions:-
i. TABLE-TO-REGISTER MOVE
ii. Bit follow
7M
7.
Explain the operation of Industrial three axis robot control system.
7M
Explain the function of Sequencer Function in PLC with an example.
7M
8.
Write short note on the following:
i. Multi bit data processing
ii. Position indicator with PID control
iii. PID tuning
iv. PID functions
14M


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