Scada Web Hmi System

Abstract: In the present invention, a SCADA web HMI client apparatus comprises a plurality of PLCs, a plurality of HMI client devices, and a SCADA device. A SCADA server device comprises a communication driver and a client management unit connected to the plurality of HMI client devices. The client management unit transmits, to the communication driver, in-use screen information indicating a screen currently used by an HMI client device. For each screen displayed by the HMI client device, the communication driver: acquires a screen-specific device list in which parts and PLC numbers and memory addresses for storing signal data corresponding to the parts are respectively determined; selects signal data determined in the screen-specific device list corresponding to the currently used screen indicated by the in-use screen information; further adds a screen identifier to the selected signal data; and transmits the resulting data to the client management unit for each data type.

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