52122-mt----programmable Logic Controllers & Its Applications

NR

Code No: 52122/MT M.Tech. – I Semester Supplementary Examinations, September, 2008

PROGRAMMABLE LOGIC CONTROLLERS AND ITS APPLICATIONS (Power Electronics) Time: 3hours

Max. Marks:60 Answer any FIVE questions All questions carry equal marks ---

1.a) b)

Explain the operational sections of PLC, CPU. Explain the proper construction of PLC ladder diagrams.

2.a) b)

Discuss the general characteristics of Registers. Discuss about module addressing of Registers.

3.

Explain the operation of subtraction and multiplication using ladder diagram.

4.

Discuss the functioning of basic two-axis robot using PLC sequence control.

5.

Explain the operation of spray process system and write the flow chart and ladder diagram for the same.

6.

Explain the block diagram of PID module and give the operations of PID tuning and functions in detail.

7.a) b)

Explain the block diagram of PID module. Discuss the BCD input and output systems with neat diagrams.

8.

Explain the following Data handling functions: a) Master Control Relay b) Jump and Move c) FIFO *****