在工业PC类微机上设计实时控制软件的一种方法

A Method to Design the Real-Time Control Softwareon the Industrial Microcomputers

在以ＭＳ－ＤＯＳ为操作系统的工控机上设计实时控制软件，必须防止ＤＯＳ内核的重入，否则会引起程序的混乱．针对工业生产过程控制要求的多任务、实时性与ＭＳ－ＤＯＳ的单任务、弱实时性之间的差异，提出了解决该问题的一种方法．用这种方法设计了两个过程控制系统的实时软件，实际运行表明该方法可靠性高，实时性好．

When a real-time control software is designed on a industrial microcomputer based on.MSDOS operating system,the reentrancy of DOS'kernel must be avoided, otherwise it would causeprogram error. There is a contradiction between the multitask,the real-time required by industrialcontrol and the monotask,the weak real-time provided by MS-DOS. A method is presented whichcan be used to solute above problems and has been applied to two real-time control softwares. Theresult shows that this method is reliable and successful.