时间陷阱是主程序的运行和对事件的处理异步进行.通过设置时间陷阱.可以在规定的时间间隔到达后自动执行某个子程序.子程序运行结束后又回到主程序的断点处继续执行.-time trap is the main program operation and the handling of asynchronous events conducted. By setting traps time. In the regulation The time interval arrival automatically