Finally, we focus our mind on the field devices layer of the industrial control system, study the device control data collection and the data traffic in detail.
最后，本文重点放在工业以太网的现场设备层，对底层设备的控制、对现场数据的采集、对数据的网络通信都分别进行了详细的讨论与研究。
On the other hand, field-control layer, as the ground floor of corporation information system, must be integrated with manufacture process managing layer and operating layer.
另一方面，现场控制层作为企业整个信息系统的底层部分，必然需要与生产过程管理层和经营决策层进行集成。
The poloidal field power supply control system of the nuclear fusion device-EAST is constituted of three layer networks: WINDOWS monitor layer, QNX realtime control layer, Fieldbus layer.
核聚变装置EAST极向场电源控制系统由三层网络组成：WINDOWS监测层、QNX实时控制层、现场总线执行层。
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