Communication lost between labview 6.0 opc to rslinx

I am reading i/o tags from an allen bradley 5/05 through rslinx using ethernet settings. Everything works fine, I read and write to the tags all day. However, If I go online through the ethernet it seems like all the bandwidth is used up and labview displays an error. maybe opc times-out. When labview is retrieving just i/o through opc, it works fine. But if it is retrieving i/o and gathering analog data from a MIO card and you try to get on the plc it faults out. Anything would help. I have attached i/o read/write vi
Attachments:
NEW_OPC_Digital_Functions.vi ‏134 KB

You could try accessing the i/o on the plc using the 'Server Explorer' program. If you do not have that program you can download it at: :Server Explorer. Server Explorer is a utility that allows you to view and interact with available OPC servers. You might also try accessing the PLC from two different computers at the same time to see if it is a problem on the PLC side. There are not any known issues with DataSocket OPC like this so you might also contact Allen Bradley about the issue.
Regards,
JR A.
Application Engineer
National Instruments

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