Förfarande för avstämning av en processstyrningsslinga i en industriel l process

摘要

In an industrial process material flow within an industrial process (23) is controlled by a process control loop. The process control loop comprises a process controller (21), a field device controller and a field device (22) in the process as well as process variable feedback (24) from the process (23) to the process controller (21). In the present invention both the process controller (21) and the field device controller, such as a valve controller, are fine-tuned so that their interaction is taken into account and controller parameters which provide an optimal control loop performance are found. This results in a significant improvement in the control loop performance, i.e. in a lower process variability, as compared with the traditional tuning method which does not take into account the interaction between the two controllers.