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针对邮政包裹分拣机的监测与故障诊断系统，介绍了简易集散控制系统中计算机与PLC进行通信及数据处理分析的方法，就在Windows95下实时多任务的实现的具体技术作了详细的介绍．
Aiming at the monitoring and fault diagnosis system of postal parcel sorter, this paper introduces the method of communication and data processing analysis between computer and PLC in simple distributed control system, and introduces in detail the specific technology of real-time multitasking in Windows95.