針對某大型港口海關對通關效率和可靠性的要求，通過分析系統結構、功能，提出了
采用分布式結構的大型港口海關電子閘集成系統。分析了系統在準確性、可靠性、穩定性以及抗干擾能力等方面的要求，對系統的部分通訊采用冗余通訊方式，對系統部分設備進行冗余控制。研究了工業以太網及現場總線等技術在系統中的合理運用。系統通過在某港口一個多月的運行測試，證明其穩定性等指標都實現了預期目標。
關鍵詞：PROFIBUS, OPC 技術, 關系數據庫
ABSTRACT: Introducing an efficient and reliable system which is designed for a large container terminal via analyzing the construction and function of the system. Analyzing the requirements of precision, reliability, stability and anti-jam ability of system，employ redundancy in the system communication and redundant control in part of system. Study the applications of technologies, such as industrial Ethernet and Field Bus, in the system. And the test results show that the system is efficient.
KEY WORD: PROFIBUS, OPC, Relation Database