Beginning with OPC

[Phill Heald]

Hi All...
I am about to embark on a project requiring me to use OPC with VB.
As I know nothing about how to use OPC with VB and the official documentation with VB6 seems non-existent in this area, I would be very grateful if anyone knows the where about of development toolkits, good documentation or any suggestions about how I should start.

With many thanks in advance
Philip

[cksiow]

I do use OPC for a SCADA software before, not sure if it will help, but if u need the sample, just message me with an email address

cksiow
htpp://vblib.virtualave.net - share our codes

[Jerome Hovington]

Hi Philip,
We are using OPC communication since 2 years instead of DDE communication. It take me about 6 month to find all files and documentation on many web site. One of the better place to go is http://www.kepserver.com/. This company offer a OPC/DDE server that work with a lot of PLC. Even if you don't use it, download it and you will have an example in VB. I don't know witch PLC you will use, but we are using AB-PLC5, CtrlLgx, Omron C200H and SquareD Symax 400. In all these PLC, the only one I have trouble is AB-CtrlLgx with RsLinx as OPC server. All other work very fine.
So, it's very fun to work with OPC. If you have any trouble, you can ask me if I ever experience the same think. Scuse for my bad english