摘要： 在实时操作系统QNX6.20 下，利用Socket API 使基于Modbus TCP/IP 协议的以太网现场总线实现多机通信。通过实验确定最佳的多机通信周期，以保证多机实时、可靠地控制和监测现场设备。实验结果应用于核聚变装置极向场电源控制系统中，提高了通信实时性和稳定性。
关键词:
极向场；以太网；现场总线；QNX；多机通信
Abstract: Using Socket API, Ethernet fieldbus based on Modbus TCP/IP protocol can communicate with several computers under QNX6.20 RTOS. The best multi-computer communication cycle is determined by experiments, so that computers can control and monitor the field equipments reliably and in real-time. It is applied to a poloidal field power supply control system of nuclear fusion device, then stability and real-time of communication are improved.
Key words:
Poloidal field; Ethernet; Fieldbus; QNX; Multi-computer communication
杨亚龙，傅 鹏，兰鲁光，何诗英. QNX 下以太网现场总线多机通信的研究[J]. 计算机工程, 2006, 32(11): 245-247.
YANG Yalong, FU Peng, LAN Luguang, HE Shiying. Research on Ethernet Fieldbus Multi-computer Communication Based on QNX[J]. Computer Engineering, 2006, 32(11): 245-247.