235A5998P001 其他 模型中的协议层

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Description

低速串行总线一般仅包含网络概念的OSI(Open System Interconnection)模型中的协议层以下的信息,用户在对变频器进行通讯控制时需要编写相应的通讯程序,同时由于传输速率较低,在响应时间要求较高的场合有一定的局限性。但低速串行总线一般是控制器和变频器的基本配置,无需增加额外成本,在价格上有明显的优势。

Allen Bradley 20AD2P1A3AYNNNC​0 1HP PowerFlex 70 *NEW*

**NIB** Reliance Electric Transistor 402410-221AW

Reliance Electric 16 Slot Rack # 57C331A

GE Fanuc 90-30 10 Slot PLC System IC693CPU331 Analog