Electrical EngineeringProgrammable Logic Controller Lab →List Of Experiments

Develop an application using Off-Delay Timer

Review Questions

1.    List the applications of off delay timer.


2.    With timing diagram explain the working of off delay timer.


3.    Write a ladder program to switch off a lamp after 10 sec delay when the input condition to the rung has failed.


4.    Explain the difference between Ton and Toff timer.


5.   When retentive timers are preferred? Suggest suitable applications.