根據智能儀表網絡化的要求，提出了基于Java 和工業以太網協議實現智能儀表通信的方案。根據51 單片機資源狀況，對TCP/ IP 協議作了有針對性的簡化，選用適用51 單片機的ODP 數據報協議。給出了以太網接口芯片RTL8019AS 于單片機的接口電路，
對通信協議、數據結構下位機C - 51 通信程序和上位機Java 程序的設計作了示例。方案的實現，使得在一種平臺下編寫的智能儀表驅動程序可無須修改地移植到其他平臺下運行，提高了設備的兼容性。
關鍵詞以太網TCP/ IP UDP Java 智能儀表單片機
Abstract In accordance with the requirements of networking intelligent instruments，the strategy of implementing communication between intelligent instruments
based on Java and industrial Ethernet protocol is stated. Aiming the resource status of 51 single chip computer，the TCP/ IP protocol is simplified.
The UDP datagram suitable for 51 single chip computer is selected. The interfacing circuit between Ethernet interface chip RTL8019AS and single
chip computer is given. The design of communication protocol，data structure，C - 51 communication program in slave computer，and Java program in
master computer is illustrated. From this implementation，the drive program for intelligent written under one platform can be transplanted into other platforms
without modification，thus the compatibility of the equipment is enhanced.
Keywords Ethernet TCP/ IP UDP Java Intelligent Single chip computer