From the point of structure features, SIS is an open-loop system, that is, the input of SIS comes from DCS, and output is to display the operation results.
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- 从SIS结构特征看,它的输入来自分散控制系统(DCS),输出仅是运行结果的显示,而其功能还在不断发展,因此说SIS是“开环”系统。