USS protocol used for communication between PLC and inverter can compensate for the lack of hardware interface converter and could realize multi-level reversible speed.
利用USS协议实现PLC与变频器之间的通信可以弥补变频器硬件接口的不足，能够实现多级正反转调速。
USS invented for frequency converter by SIEMENS is a kind of communication protocol. In small automation control system, using USS protocol is a good solution.
USS是西门子公司为变频器开发的通信协议，在规模较小的自动化系统中，USS协议通信方式是一种很好的解决方案。
USS invented for frequency converter by SIEMENS is a kind of communication protocol. In small automation control system, using USS protocol is a good solution.
USS是西门子公司为变频器开发的通信协议，在规模较小的自动化系统中，USS协议通信方式是一种很好的解决方案。
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