Woodward 8446-1019 控制模块 DCS PLC系统原装进口

Woodward 8446-1019 控制模块 DCS PLC系统原装进口

I/O点数估算时应考虑适当的余量，通常根据统计的输入输出点数，再增加10%~20%的可扩展余量后，作为输入输出点数估算数据。实际订货时，还需根据制造厂商可编程逻辑控制器的产品特点，对输入输出点数进行圆整。

存储器容量是可编程序控制器本身能提供的硬件存储单元大小，程序容量是存储器中用户应用项目使用的存储单元的大小，因此程序容量小于存储器容量。设计阶段，由于用户应用程序还未编制，因此，程序容量在设计阶段是未知的，需在程序调试之后才知道。为了设计选型时能对程序容量有一定估算，通常采用存储器容量的估算来替代。

I/O point estimation should consider the appropriate margin, usually according to the statistical input and output points, and then increase the expandable margin of 10% to 20%, as the input and output point estimation data. When actually ordering, it is also necessary to round out the input and output points according to the product characteristics of the manufacturer's programmable logic controller.

The memory capacity is the size of the hardware storage unit that can be provided by the programmable controller itself, and the program capacity is the size of the storage unit used by the user application project in the memory, so the program capacity is less than the memory capacity. In the design phase, because the user application has not yet been written, the program capacity is unknown in the design phase and needs to be known after the program debugging. In order to have a certain estimation of program capacity during the design and selection, the estimation of memory capacity is usually used instead.