Scada Web Hmi System

Abstract: A memory of an HMI server device stores image data pertaining to an HMI screen, screen-operation-rights information, and part-operation-rights information. The screen-operation-rights information determines, in accordance with an operation location and for each HMI screen displayed on a web browser, whether the HMI screen can be operated. The part-operation-rights information determines, in accordance with the duties of an operator and for each HMI screen, whether a specific operation part on the HMI screen can be operated. A processor of the HMI server device executes a web server capable of transmitting the image data, the screen-operation-rights information, and the part-operation-rights information to the web browser. A memory of an HMI client device stores the image data, the screen-operation-rights information, and the part-operation-rights information from the web server. A processor of the HMI client device applies the operation propriety determined in the screen-operation-rights information to a plurality of operation parts on the HMI screen, and preferentially applies the operation propriety determined in accordance with duties in the part-operation-rights information to the specific operation part, to draw the HMI screen on the web browser.

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