| 摘要 |
Disclosed is a method of and system for addressing plural data points variously located throughout an industrial installation or process from a central unit. The data points are grouped in stations which discriminate between a plurality of signal translating channels, for example, seven. The selection of any given data point is performed in two phases: addressing or selecting a station by transmitting from the central unit a combination of, for example, four channel signals selected from the exemplary seven channels, followed by addressing or selecting the given point by transmitting a combination of a lesser number, for example, three channel signals also selected from the exemplary seven channels. The data from the addressed point may be transmitted to the central unit either in digital form or as a frequency-modulated signal and/or the addressed point may serve as a control for a process. Both the central unit and the data points may be transceivers and communications therebetween may be transmitted by various suitable media.
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