A TOF timer starts to accumulate time when the rung:
A)makes a true to false transition.
B)makes a false to true transition.
C)when the done bit is set to 1.
D)when the done bit is reset to 0.

Question

Quizplus · Accepted Answer

A TOF (Timer Off-Delay) timer starts to accumulate time when the rung makes a true to false transition. This means the timer begins its timing operation once the input condition switches from being true (or on) to false (or off).

A TOF Timer Starts to Accumulate Time When the Rung