Has anyone ever comminucated to a Siemens Micromaster 420

[Walkerok]

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

[Walkerok]

Bump,

Ok lets refrase the question has anyone tried this and failed. I would use the Profibus option that is possible in the VFD to make this happen, but there is no profibus card avaialbel for a V570, V1040, or V1210.

Thanks

Keith

[AlexUT]

Hi,

Following is the link to site where USS protocol description attached.

http://support.automation.siemens.com/BR/llisapi.dll?func=cslib.csinfo&lang=pt&objid=40157517&caller=view

http://support.automation.siemens.com/BR/llisapi.dll?func=cslib.csinfo&lang=pt&objid=40157517&caller=view

BR.