用ＲＳ－４８５实现远距离的数据采集与控制沈阳电力高等专学校王月志唐山钢铁公司设计院曹宝沈阳黄金学院郭庆泽在工业生产过程监控中，往往有大量的开关量信号如设备运转的启停、行程限位、上下限报警等等需要从生产现场传给主控室或调度室，二者又往往间隔较远的距离，... RS-485 to achieve long-distance data acquisition and control of Shenyang Electric Power College Wang Yuezhi Tangshan Iron and Steel Company Design Institute Cao Bao Shenyang Gold Institute Guo Qingze In the industrial process monitoring, there are often a large number of switching signals such as equipment operation start and stop, Limit travel, upper and lower limits alarm, etc. need to pass from the production site to the master control room or dispatch room, the two are often separated by a long distance, ...