This paper introduces the reconstruction of circulation water pump\'s control system in ZhenHai power plant, which base on PLC redundant system. We mainly discuss how to realize no-interference switch between main and backup controller by ActiveX technology.Key words:circulation water pump, control, ActiveX technology, PLCApplications of ActiveX technology to circulation pump\'s control system in power plantXu Xianzhen1 Chen Xiaoqiang2 1(Department of Information and Automation Engineer, Changshu Institute of Technology, Changshu 215500) 2(ZheJiang Electrical Power Research Institute 310014) E-mail:xuxianzhen@tom.com Abstract:The reconstruction of circulation water pump\'s control system in ZhenHai power plant is presented in this paper, which base on PLC redundant system. We mainly discuss how to realize no-interference switch between main and backup controller by ActiveX technology.Key words:circulation water pump, control, ActiveX technology, PLC
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