The features and applicable areas of software PLC based on PC platform and module inserted PLC are presented.
介绍了基于PC平台的软件PLC和插卡式PLC的特点和应用场合。
The application of PLC in the control system of platform booms, the hardware and software design method of PLC control system are presented and discussed.
介绍了PLC在舞台吊杆控制系统中的应用，以及PLC控制系统的硬件和软件的设计方法。
Then, the requirements of the soft PLC platform are considered, and the overall structure of the system is designed based on software engineering and IEC61131-3 international standard.
然后再结合软件工程和IEC61131-3国际标准，对PLC程序开发系统进行了需求分析并设计了总体结构框架。
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