Importance

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Abstract

The method guarantees the integrity of a process control systems display in an open system windows environment. The process control system includes an interface apparatus to at least one foreign system, and receives display information such that the display information from the foreign systems and the display information from a network of the process control system are displayed on a display unit of the process control system in a windows format in response to control information from the interface apparatus. The interface apparatus transmits the display information of the foreign systems to a display generator unit via a first input channel of the display generator unit. Control information is also transmitted to the display generator unit via the first input channel to command a display format to the display generator unit of the display unit. The display format includes a plurality of windows, one of the windows being a control view. The control view (display of the process control system) display information is transmitted to the display generator unit via a second input channel of the display generator unit. Communication checks are made between the display generator unit and the interface apparatus. If an error is detected by either unit, the first input channel is disabled, and the control view is displayed on the entire screen of the display unit and controlled by the display generator unit, thereby guaranteeing the control view is always displayed and the integrity of the process control system is maintained.

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First Claim