According to the industry field bus technology, this paper has built three layer model for the bus of fire alarm and control system, and has described each layer.
本文参照工业现场总线，提出了火灾报警及消防联动系统现场总线的三层模型，并分别进行了描述。
Industry Ethernet and process field bus is the mainstream technology in 21 century. It is widely used nowadays.
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。
Lastly, this paper prospected the foreground of field bus in the industry control field.
在文章的最后，本文对现场总线技术在工业控制领域的应用前景作了展望。
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