Question

Which Allen-Bradley PLC timers faloniag operation?

accumulated registers will reset to rero when the timer will open the contact. they are de-energized?
A. TON and RTO
B. TON, ItTO, and TOF
C. TOF and RTF
D. TON and TOF

Answer 1

In Allen-Bradley PLCs, both TON (Timer ON Delay) and TOF (Timer OFF Delay) timers will reset their accumulated values to zero when de-energized.

Step-by-step explanation:

The Allen-Bradley Programmable Logic Controller (PLC) timers that will reset the accumulated value to zero upon de-energization are the TON (Timer ON Delay) and TOF (Timer OFF Delay). The TON timer begins to count time when the input condition is true, and if the input goes false before the preset time has been reached, it resets the accumulated time to zero. The TOF timer begins to count time when the input condition goes false, and it will also reset the accumulated time to zero if the input condition becomes true before the preset time is reached.

Answer: D. TON and TOF