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我厂罐区自动化工作由六号罐区发展到四号罐区,控制及测量的对象越来越多,为了适应全油罐区实现综合自动化,必须考虑信息传输方式的选择。六号罐区罐少(12个),占地面积小,控制及测量对象都较少,因而我们采用分离通道的单回路制,即每个对象分别直接拉线到操作室。四号罐区较大(22个罐),占地面积也大得多,仅经常操作的阀门就有114个,再加上测量及回讯的对象,又达250个以上,如果采取直接拉线的方法,则耗费电缆多,铺
The automation of our factory’s tank farm has been developed from No. 6 tank farm to No. 4 tank farm. With more and more objects of control and measurement, in order to realize the comprehensive automation of the whole tank farm, the choice of information transmission mode must be considered. There are a few tankhouses in Zone 6 (12), which covers a small area with less control and measurement objects. Therefore, we use a single-circuit system with separated channels, that is, each object directly pulls the wires to the operating room. The fourth tank area larger (22 cans), covers an area is also much larger, there are only 114 valves often operate, together with the object of measurement and response, and up to 250 or more, if the direct pull line The method, then spend more cable shop