Information about Simatic MPI OPC and DDE server

V

Thread Starter

Volkan

Hi to all,
Who knows this application?
DDE server and OPC server?
Can I collect data with Visual Basic via the Simatic OPC server and via the Simatic DDE server?
Thanks,
Regards,
volkan
[email protected]
 
S
> Check the VB Samples for OPC available with the SIMATIC NET CD.

I have tryed, but everything are so 'kryptic' without examples and comments. I need one Long variable from 341/some DB and I like write one Long to some DB. What have to be in VariableName in S7Data.ReadVariable(VariableName As String, Value, State As Long, TimeOut As Long) As long.
What is State's content ? What are returned Errors ? How I tell variable address in VariableName, I, O, DB etc.. what are the formats ?
 
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