The objective of paper is to summary of Profibus and Foundation fieldbus technology in a well-known American engineering company's project,ABB DCS system AC800 xA adopted for industry service, multiple comparison subjects created,conclusion is why profibus PA is more economical solution for petrochemical industries.%本文对于Profibus PA和Foundation Fieldbus进行了多个层面的比较分析，通过美国知名工程公司执行的某个项目中控制系统采用ABB公司AC 800xA总线技术的总结，从应用层面探讨了Profibus总线技术在化工工业领域更具有经济性的结论。
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