The origin of the supervisory shell for controllers are generalized, its main task is summed up, the modular structure and design method of the supervisory shell is introduced.
简述了控制器监督级的由来，归纳了它的主要任务，介绍了模块化的构造与设计方法。
The origin of the supervisory shell for controllers are generalized, its main task is summed up, the modular structure and design method of the supervisory shell is introduced.
简述了控制器监督级的由来，归纳了它的主要任务，介绍了模块化的构造与设计方法。
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