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自动控制领域的新热点──现场总线７０年代工业控制仪表统一采用４～２０ｍＡ标准信号，但随着信息量的增加，出现了４～２０ｍＡ传输的瓶颈效应。为了解决这一效应，８０年代出现了一项新技术——现场总线（Ｆｉｅｌｄｂｕｓ）。现场总线就是把通信总线一直延伸到现场设...
New hot spot in the field of automatic control ─ ─ Fieldbus Industrial control instruments in the 1970s unified standard 4 ~ 20mA signal, but as the amount of information increases, there is a bottleneck effect of 4 ~ 20mA transmission. To address this effect, a new technology emerged in the 1980s - the Fieldbus. Fieldbus is the communication bus has been extended to the scene set ...