What is an open loop ?
An open loop is a type of continuous control system in which the output has no influence or effect on the control action of the input signal. (1) That means, there is no controller monitoring a specific desired value, this type of system is the most easy to use because there is no need form programming a controller; however, for automation it is not highly recommended due to the fact that the monitoring has to be made manually and many human errors can be made.
Figure 1 shows a common open-loop system, as it is observed, there is no feedback to the controller; therefore, no automated comparison can be made in respect to the input (set point) and the desired output. Figure 2 present the open-loop diagram for the Amatrol's T-5554 Analytic Process Control System.
An open loop is a type of continuous control system in which the output has no influence or effect on the control action of the input signal. (1) That means, there is no controller monitoring a specific desired value, this type of system is the most easy to use because there is no need form programming a controller; however, for automation it is not highly recommended due to the fact that the monitoring has to be made manually and many human errors can be made.
Figure 1 shows a common open-loop system, as it is observed, there is no feedback to the controller; therefore, no automated comparison can be made in respect to the input (set point) and the desired output. Figure 2 present the open-loop diagram for the Amatrol's T-5554 Analytic Process Control System.
AMATROL T5554 Open Loop
Instituto Tecnológico de Estudios Superiores de Monterrey Campus Estado de México.