Aiming at the weakness of electric - automation control system in combination reaction product line of chemical industry , this paper detailedly introductes how to reconstruct the former system successfully by applying the advanced plc , inverter , fieldbus and hmi , how to get to higher demand of producing technics and how to acquire better technique and economic benefit 摘要針對化工化合生產(chǎn)線電氣自動化控制系統(tǒng)的缺點,詳細(xì)介紹了運用先進的plc 、變頻器、現(xiàn)場總線及hmi (人機界面)技術(shù),對老系統(tǒng)進行成功的改造,達到了較高的生產(chǎn)工藝要求,并取得了良好的技術(shù)、經(jīng)濟效益。