在現(xiàn)代化工業(yè)生產(chǎn)中，PLC 和現(xiàn)場(chǎng)總線等自動(dòng)化設(shè)備的應(yīng)用越來越廣泛。為了防止
PLC 故障造成不必要的生產(chǎn)停頓和安全性問題,目前，PLC 各生產(chǎn)廠家都推出了雙機(jī)熱備份產(chǎn)品。對(duì)于中小型控制系統(tǒng)，采用一些已成型的雙機(jī)熱備份產(chǎn)品會(huì)顯得成本過大，因此，本文基于歐姆龍PLC，討論了通過軟件方式實(shí)現(xiàn)雙機(jī)熱備份的方法。
關(guān)鍵詞：PLC，雙機(jī)熱備份，RS-232C，軟件,OMRON
Abstract: in the modern industry production, automation devices like PLC and Fieldbus are more and more widely used. At present, in order to prevent the unnecessary production intermission and security matter caused by fault of PLC, every PLC manufacturer bring forward their dual controllers backup system. With regard to middling and small system, it is too expensive to adopt the present dual controllers backup system. So author discuss realizing the dual controllers backup system in the way of software based on the OMRON PLC.
Keyword: PLC, Dual controllers system, RS-232C，Software, OMRON