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介紹了三菱FX系列PLC與變頻器之間的RS-485通訊,分析了PLC與變頻器基于485通訊的硬件連接、變頻器的設(shè)置、通訊協(xié)議,并給出了應(yīng)用實例及其相關(guān)的PLC程序。
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Introduction to RS485 RS232 , RS422 , RS423 and RS485 are serial communication methods for computers and devices. RS232 is without doubt the best known interface, because this serial interface is implemented on almost all computers available today. But some of the other interfaces are certainly interesting because they can be used in situations where RS232 is not appropriate. We will conce