A base control is a type of control used in process control systems to regulate the process variable. It is used to maintain the desired value of the process variable by adjusting the manipulated variable. The base control is usually used in combination with other types of control such as feedforward, cascade, and ratio control. The base control is the most basic type of control and is used to keep the process variable at a desired value. It is usually used in combination with other types of control to ensure the process variable is kept at the desired value. The base control is based on the PID (Proportional-Integral-Derivative) algorithm which is used to adjust the manipulated variable in order to maintain the desired value of the process variable. The base control is used in a variety of industries including manufacturing, chemical processing, and oil and gas production. It is an important tool for ensuring the process variable is kept at the desired value.