1756-L62

1756-L62

1756-L62

（ 4 ）分配 I/O 点

分配 PLC 的输入输出点，编制出输入 / 输出分配表或者画出输入 / 输出端子的接线图。接着九可以进行 PLC 程序设计，同时可进行控制柜或操作台的设计和现场施工。

（ 5 ）设计应用系统梯形图程序

根据工作功能图表或状态流程图等设计出梯形图即编程。这一步是整个应用系统设计的最核心工作，也是比较困难的一步，要设计好梯形图，首先要十分熟悉控制要求，同时还要有一定的电气设计的实践经验。

（ 6 ）将程序输入 PLC

当使用简易编程器将程序输入 PLC 时，需要先将梯形图转换成指令助记符，以便输入。当使用可编程序控制器的辅助编程软件在计算机上编程时，可通过上下位机的连接电缆将程序下载到 PLC 中去。

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