Jawaharlal Nehru Technological University Anantapur 2012-2nd Year B.Tech Electrical and Electronics Engineering JNTU, ANANTAPUR IV semester (R07) Regular & Supplementary s, ch/il , PROGRAMMABLE LOGI

code: R7420205 SET 1
JNTU, ANANTAPUR B.Tech IV year II semester (R07) Regular & Supplementary Examinations, March/April 2012 PROGRAMMABLE LOGIC CONTROLLERS (Electrical and Electronics Engineering)
Time: three hours Max Marks:80
ans any 5 ques.
All ques. carry 16 marks.

1(a) discuss the proper construction of PLC ladder diagrams.
1(b) explain about the devices connected to PLC input modules.
2(a) discuss the various PLC input devices.
2(b) Develop the PLC logic for simple circuit with 1 switch as a contact and 1 output as a coil.
3 find the relay and PLC equivalents for the subsequent gates. (i) OR and (ii) NOR.
4(a) define the PLC input registers.
4(b) discuss the models addressing format.
5 explain about the various states in a timing cycle using sequencing chart.
6(a) Illustrate a process requiring a jump with non return instruction and draw the ladder logic diagram.
6(b) define how a jump with return instruction works.
7 Develop a drum controller control system to operate a industrial pick and place Robot.
8(a) define how proportional, integral and derivative control system s are combined for effective process control.
8(b) discuss the characteristics of a PID module.

Earning:   Approval pending.