摘要
根据智能仪表网络化的要求 ,提出了基于Java和工业以太网协议实现智能仪表通信的方案。根据 5 1单片机资源状况 ,对TCP/IP协议作了有针对性的简化 ,选用适用 5 1单片机的ODP数据报协议。给出了以太网接口芯片RTL80 19AS于单片机的接口电路 ,对通信协议、数据结构下位机C - 5 1通信程序和上位机Java程序的设计作了示例。方案的实现 ,使得在一种平台下编写的智能仪表驱动程序可无须修改地移植到其他平台下运行 ,提高了设备的兼容性。
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.
出处
《自动化仪表》
CAS
2005年第1期34-37,共4页
Process Automation Instrumentation
