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在最近20年,工业自动化领域发生两次基本的革命,按照Phoenix Contact的Wolfgang Blome的说法,首先是1975年到1985年,PLC技术已完全侵入传统的继电器控制技术,其次是1985年到1995年,特点是通讯及网络技术的发展,通讯技术已引导现代工厂自动化中开始的第三次革命:分散的、开放的控制结构,这是在1997年汉诺威博览会“开放控制集团”新闻发布会所说的。对许多工业自动化领域而言“开放控制”的含义是控制采用PC机和标准总线或现场总线,一年前(1996年)Interbus Club宣布,他将努力联合其他公司以规定开放控制标准,目前其成员已
In the last 20 years, two basic revolutions have taken place in the field of industrial automation. According to Phoenix Contact’s Wolfgang Blome, first from 1975 to 1985, PLC technology has completely invaded traditional relay control technology, followed by 1985 to 1995. The characteristic is the development of communication and network technology. The communication technology has guided the third revolution started in modern factory automation: a decentralized and open control structure. This was the press conference of the Hannover Expo “Open Control Group” in 1997. Say. The meaning of “open control” in many areas of industrial automation is the use of PCs and standard or fieldbus controls. A year ago (1996) Interbus Club announced that he would work with other companies to define open control standards. Currently its members have