Asked by Keyona Lyles on Jun 10, 2024
Verified
The main difference between a PLC retentive and nonretentive timer is that the:
A) retentive timer can be programmed for much longer time delay periods.
B) nonretentive timer can be programmed for much longer time delay periods.
C) retentive timer maintains the current time should power be removed from the device or when the timer rung goes false.
D) nonretentive timer maintains the current time should power be removed from the device or when the timer rung goes false.
Retentive Timer
A type of PLC timer that retains its value even after the power is turned off or the controlling logic is no longer true.
Nonretentive Timer
A timer in a control system that does not retain its count or state after a power cycle, restarting from zero.
- Acquire knowledge on the differences and applications of retentive versus non-retentive timers.
Verified Answer
MV
mayank vermaJun 17, 2024
Final Answer :
C
Explanation :
A retentive timer, as its name suggests, retains the current time even if power is removed from the device or when the timer rung goes false. Nonretentive timers, on the other hand, reset to zero once power is removed or when the timer rung goes false. The length of time delay periods that can be programmed is not affected by whether the timer is retentive or nonretentive.
Learning Objectives
- Acquire knowledge on the differences and applications of retentive versus non-retentive timers.