Walkerok Posted November 12, 2012 Report Share Posted November 12, 2012 I have been asked to communicated with a Siemens Micromaster 420 VFD. The standard VFD has one RS485 communications port but the only supported protocol is what Siemens call USS protocol (the U stands for Universal). Even though Siemens calls this universal I have never encountered it before and know exactly nothing about it. The only clue I see as a hopeful sign is that in Visilogic the drop down box "COM" has something at the bottom called "Telegram Parser". Apparently the not so universal "USS" protocal requires a telegram style communications (at least that what I could look up on the internet). Right now I have visions off anyone who programs out of the USA laughing at me about how it really is common the USS protocol is in your parts of the world . Has anyone successfully done this, and if so I could really use some guidance? The manual for the Micromaster 420 so far has been no help at all. Thank You Keith Quote Link to comment Share on other sites More sharing options...
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