What is the function of a PLC’s PID (Proportional-Integral-Derivative) control?
A. To control the speed of a motor
B. To control the temperature of a process
C. To control the flow of a liquid
D. All of the above
Answer:D
What is the function of a PLC’s PID (Proportional-Integral-Derivative) control?
A. To control the speed of a motor B. To control the temperature of a process C. To control the flow of a liquid D. All of the above
Explanation: A PLC’s PID control is a control algorithm that can be used to control the speed of a motor, the temperature of a process, and the flow of a liquid. PID control uses a feedback loop to compare the desired value of a process variable (such as temperature or flow) to the actual value, and then adjusts the control output (such as the speed of a motor or the flow of a liquid) to bring the process variable closer to the desired value. This feature is particularly useful for industrial processes that require precise control of a process variable.