What is the purpose of a PID controller in a process control system?
A. To provide real-time data on process performance
B. To monitor process variables such as temperature and pressure
C. To monitor the operation of motors and drives
D. To regulate the process variable to a setpoint
Answer:D
What is the purpose of a PID controller in a process control system?
A. To provide real-time data on process performance B. To monitor process variables such as temperature and pressure C. To monitor the operation of motors and drives D. To regulate the process variable to a setpoint
Explanation: A proportional-integral-derivative (PID) controller is used in process control systems to regulate the process variable to a setpoint. By continuously adjusting the control signal based on the difference between the setpoint and the measured process variable, the PID controller can maintain the desired process conditions.