通过USS协议实现变频器的PLC控制

摘要

在变频拖动工程实践中，常规采用开关量和模拟量对变频器进行控制。本文讨论了采用基于RS485接口的USS通信协议对变频器进行控制的方法和程序设计，有效地减少了系统布线，提高系统的抗干扰能力。%In the AC variable drive engineering, I/O and analog signals are often used to control a frequency converter. This paper discusses the method of controlling the AC variable drive by using PLC and USS protocol based on the RS485 interface. The application results show that this method can reduce electric connections and improve the anti-jamming capability of the system.