为了排除人为干扰、提高可靠性，采集数据以可编程逻辑控制器为核心，通过现场总线和以太网的多层网络传送至数据库中。
To avoid interfering by work, data were sampled through a multi-layers network which synthesize the field-bus and Ethernet and center on programmable logic controller.
工业以太网和过程现场总线控制技术是21世纪的主流技术，应用也将会越来越广泛。
Industry Ethernet and process field bus is the mainstream technology in 21 century. It is widely used nowadays.
最后介绍了采用协议转换原理研究开发的一种支持工业以太网与多种现场总线技术转换的多协议转换器。
A multiple protocol converter developed by using protocol conversion principle is introduced finally, it supports industrial Ethernet and multiple field bus technology conversion.
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