In a closed-loop control system, the PLC control program acts to:
A)form a closed circuit between input and output modules.
B)monitor the output signal and adjust the input signal accordingly.
C)keep the input and output in balance.
D)correct any difference between the measured value and the desired value.

Question

Quizplus · Accepted Answer

In a closed-loop control system, the PLC control program continuously monitors the output signal and compares it to the desired value. If there is any difference between the measured value and the desired value, the program automatically adjusts the input signal to correct the difference and keep the system in balance. Therefore, the correct choice is D - correct any difference between the measured value and the desired value.

In a Closed-Loop Control System, the PLC Control Program Acts