What is the purpose of a PLC in a process control system?
A. Only control the operation of motors and drives
B. Only monitor process variables such as temperature and pressure
C. To monitor & control the sequence of operations in a process
D. To provide process performance
Answer:C
What is the purpose of a PLC in a process control system?
A. Only control the operation of motors and drives B. Only monitor process variables such as temperature and pressure C. To monitor & control the sequence of operations in a process D. To provide process performance
Explanation: A programmable logic controller (PLC) is used in process control systems to monitor and control the sequence of operations in a process. By receiving input signals from sensors and other devices, the PLC can control the operation of pumps, motors, valves, and other process equipment.