| 摘要 |
A system ( 100 ) and method for remotely monitoring and controlling time variant data in an industrial plant ( 400 ). The system ( 100 ) includes a local server ( 102 ) and at least one remote server ( 104 ). The local server ( 102 ) includes a local server cache ( 206 ), a local controller ( 308 ), and a local operator station ( 1001 ). Each remote server ( 104 ) includes a remote server cache ( 901 ) and a remote controller ( 903 ). Wherein the local server cache ( 206 ) stores a plurality of data units ( 304 ), and the local controller ( 308 ) provides updated units ( 902 ) to the local server cache ( 206 ). Each remote server cache ( 901 ) stores a plurality of data units ( 902 ), and each remote controller ( 903 ) provides updated data units ( 902 ) to its corresponding remote server cache ( 901 ). The method operates such that each cache ( 206, 901 ) buffers controllers ( 308 ) and other servers ( 104 ) from unnecessary data requesting transactions, minimizing the data traffic in the system ( 100 ). A communication network hardware in the form of a Wide Area Network (WAN) ( 106 ) interconnecting all the servers ( 102, 104 ), and a unique data point identifier ( 204 ) associated with the at least one remote server ( 104 ) are also disclosed.
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