Patent ID: 6618648
Filing Date: 2003-09-09
Classification: G01R,H02H,H02J,Y02B,Y02E,Y02P,Y04S

Abstract:
A control system for controlling a plant according to a state quantity related to the plant and inputted therefrom, said system comprising:a communication network; an input device connected to the communication network so that data communication is permitted, said input device having: means for acquiring a precise time, inputting means for inputting the state quantity related to the plant therefrom, converting means for sampling the inputted state quantity according to the acquired precise time so as to convert the state quantity into digital data and first transmitting means for adding the precise time at each sampling timing to the digital data so as to transmit the digital data each having the precise time to the communication network; an opening/closing device connected to the communication network so that data communication is permitted and adapted to opening and closing a part of the plant, said opening/closing device having: means for receiving, through the communication network, a control command with respect to the opening/closing device and second transmitting means for transmitting an operating state of the opening/closing device to the communication network; and a control apparatus connected to the communication network so that data communication is permitted, said control apparatus having: means for performing a control operation process according to the digital data transmitted through the communication network and the operating state of the opening/closing device transmitted therethrough and third transmitting means for transmitting the control command through the communication network to the opening/closing device in response to a result of the control operation process of the performing means, wherein â€ƒsaid precise time has an accuracy of substantially 1 &mgr;s to 100 ns.