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Connecting to multiple Foundation Fieldbus devices in sequence using FF Open VFD.

I am trying to connect to multiple Fieldbus devices on the same bus. When I try
to connect using "FF Open VFD" the input it has is VFD tag (I left it as
default (0)). I can connect to one device, poll it and close the connection.
However, when I try to do the same with the next device, it errors out on Open
VFD. The bus all seems to be connected properly, I can poll all of the devices
out there and get their various IDs, so I believe that it is all communicating
right.  
I have tried connecting using different, unique VFD tags. Like I mentioned, I
have tried disconnecting and closing the whole connection before trying to
connect to another unit. I've tried connecting to individual units with the
others disconnected from the bus and each will connect and work just fine, so I
know each is capable of working- just not when other units are also present.

 

Any insight is appreciated.

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Hi Darren_Odom,

 

I recommend posting this question in the Foundation Fieldbus forum: http://forums.ni.com/t5/FOUNDATION-Fieldbus/bd-p/120

 

My colleague LewisL monitors this forum and assists with FF questions.

 

Thanks!

Matt S.
Industrial Communications Product Support Engineer
National Instruments
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