基于QNX的SCADA系统嵌入式通信前置机的研究与设计

针对目前调度管理自动化系统中通信前置机数据传输的“瓶颈”问题，给出了采用QNX实时多任务操作系统的解决方案。文章介绍了QNX操作系统特点，并就实时性等方面与Windows系统进行了比较。根据前置机的软硬件特点，给出了基于QNX的通信前置机详细的软件流程设计。基于QNX的通信前置机真正实现了对通信的实时多任务管理，大大提高了通信实时性及可靠性。

Research and design of embedded front end computer in SCADA system based on QNX

For the bottle-neck problem of embedded front end computer data transfer in management system presently,this thesis brings forward the project of real-time and multi-task operating system based on ONX. The characteristic of ONX operating system is introduced,and the real-time character of ONX operating system is compared with which of windows operating system. In the end,the detailed software flow design of embedded front end computer based on QNX by the its software and hardware characteristics. Front end computer based on QNX realize real-time and multi-task operating of communication, greatly improved real time and reliability.