PROCESS CONTROL LOOPS A Review Article

Process control refers to the methods that are used to control process variables when manufacturing a product or controlling any parameter. In today’s modern plants, to achieve control, several elements are coordinated together to achieve the control objective. Process control is an engineering discipline that deals with architectures, mechanisms and algorithms for controlling the output of a specific process within a desired range. In any instrumentation system, the control objective can be accomplished by designing proper control system for a specific purpose. Control can either be manual or automatic. Manual control involves the controlling process parameter to a specific value using human intervention. In automatic control, no human intervention is required rather sensors, controllers, actuators and other control elements are used to automatically control a system to maintain the system parameters to desired levels. This paper will explain the process control and different types of control loops.