Electrical EngineeringProgrammable Logic Controller Lab →List Of Experiments

Develop an application using Off-Delay Timer

1. The main difference between a Ton and a Toff timer is that
a) Toff can maintain the accumulated time on loss of logic continuity
b) Toff timer begins timing when logic continuity to the rung is lost
c) Ton can maintain the accumulated time on loss of logic continuity

2) DN bit for Toff timer is initially high when the program is switched to run mode after downloading
a) True
b) False
c) Can’t say

3) The done bit changes state whenever
a) the timer timing value reaches the preset value
b) the accumulated value reaches the timer timing value
c) the accumulated value reaches the preset value

4) Toff is used when action is not expected after specific delay
a) True
b) False
c) Can’t say

5) In off delay timer the status of TT bit is same as
a) Rung condition IN bit
b) EN bit
c) DN bit