Patent ID: 7970941

Claim:
A control system comprising: a terminal apparatus including: a terminal-end recording means for storing screen data in a format suitable for display processing, the screen data being for a display-use screen and including, one or more process instruction words each including one or more reference information referred to for each carry-out event which is generated in advance in order to display in accordance with device data of a predetermined device; the screen data is obtained by combining process instruction words including: a process instruction word for displaying, on a predetermined area of one of the display-use screens, a display element corresponding to predetermined device data; a process instruction word for specifying an input operation; a control display apparatus, which reads out device data indicating a state of a device from a predetermined recording area and displays the device data on one of display-use screens that have been generated in advance, and which gives a control instruction to the device via said one of display-use screens, the control display apparatus including a recording means for storing therein screen data, which is data of the display-use screens, and a transmitting means for transmitting the screen data stored in the recording means in accordance with a request from the terminal apparatus; and a host computer including; a communication means for acquiring, from the control display apparatus, the device data indicating a state of the device, the communication means being capable of communicating with the terminal apparatus via a network, an execution program recording means for storing therein an applet for causing the terminal apparatus to perform an action of inquiring the communication means about the device data corresponding to the screen data transmitted, and an action of displaying the one of display-use screen screens on the terminal apparatus in accordance with the device data corresponding to the process instruction word and a response to the inquiring, and a generating means for generating terminal-use data for displaying one of the display-use screens on a display surface of the terminal apparatus, in accordance with the thus acquired device data and the transmitted screen data, the communication means transmitting the applet and the terminal-use data to the terminal apparatus, and acquiring device data that is inquired about by the terminal apparatus, so as to transmit the device data to the terminal apparatus, and the terminal apparatus executing the applet so as to inquire the communication means about the device data, to cause one of the display-use screens to be displayed based on the terminal-use data, and to cause the state of the device to be displayed on said one of the display-use screens based on the device data acquired from the communication means.