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UniOPC read write

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I am connecting to a VB application and currently use OPC Server V. 1.05, it has a couple of issues I need to address with the new UNIOPC server 1.3.8

I am using RS232 , Baud 57600, 8,1,none port setting on both the server and com port.

I made the switch, and disaster struck. I can call a VB screen and watch the log as it requests, confirms data, requests, confirms data for each OPC item on the screen, this is slow!!!!

Usually the server just shuts down,

any suggestions?

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Which PLC are you using?

Can you explain in more details what is the relation between the VB application and OPC server?

Does the VB application act as OPC client? Does it has OPC driver?

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