In a Distributed Control System (DCS), what is the primary function of a Human-Machine Interface (HMI)?

In a Distributed Control System (DCS), the primary function of a Human-Machine Interface (HMI) is to provide a graphical user interface for operators to monitor and control the power plant processes. The HMI presents real-time information about the plant's status, including process variables such as temperatures, pressures, flow rates, and equipment status. It allows operators to visualize the process through graphical displays, trends, and alarms. Operators can use the HMI to make adjustments to setpoints, control loops, and equipment operations. It provides a central point for operators to interact with the DCS, enabling them to manage the plant safely and efficiently. The HMI also provides tools for diagnosing problems, analyzing data, and generating reports. It serves as the primary interface between the human operator and the automated control system, facilitating informed decision-making and effective plant management.