HMIs communicate with programmable logic controllers (PLCs) and input/output sensors to acquire and display information for viewing by the user.HMI screens can be used for a single function, such as monitoring and tracking, or to perform more complex operations, such as shutting down a machine or increasing the speed of production, depending on how they are implemented.
HMIs are used to optimize industrial processes by digitizing and centralizing data for the viewer. By utilizing HMI, operators can view important information displayed in graphs, charts, or digital dashboards, view and manage alarms, and connect to SCADA and MES systems all from one console.
Previously, operators needed to constantly walk the floor to view mechanical progress and record it on a piece of paper or whiteboard. By allowing the PLC to transmit real-time information directly to the HMI display, HMI technology eliminates the need for this outdated practice, thus reducing many costly problems caused by missing information or human error.