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The OPC Data componant and OPC Web Client are .Net componants that have been used in a number of industrial applications. See http://www.opcdata.net/ They also have lots of example code!

If you have to get the program through Ethernet then you have to use SimaticNet. If you can use the programming port you have other less expensive options.

We've done this with Wonderware using the TOP Server's Suitelink interface to Wonderware and the Mitsubishi FX driver. It has a Stattbus driver too, but I am not sure if that's what your using. Just configure the thing to connect to your Mits and set-up a Access name to talk to the Server and...

If using a PC is a possiblity I have a different kind of answer for you.

If your can set up the PLC2 as a master sending messages then I do know a way. The AB Unsolicited driver in the TOP Server can read these PLC2 type unsolicited messages. It doesn't have a master driver that would work. See http://www.toolboxopc.com for a demo version. RSLinx Professional may...

An other way what works, since you have the Ethernet connection for your Scada system is to use the TOP Server with it's ControlLogix Ethernet Driver. It has something called a DX plug in that will let you use the server to transfer data from one device to another without actually interacting...

I don't know of any activeX's, but you can use the TOP Server with it's Mishubishi FX driver. You can connect to this server via DDE or use an OPC ActiveX if you need the data faster. See the http://www.toolboxopc.com web site to get a free demo. It works reasonablly well, but you do have to...

Do you need to get to the Program via Ethernet or do you just need data from the PLC?

Two good ways to connect to almost any AB PLC with VB6.0 are by using the InGear Studio ActiveX or the TOP Server's AB Driver Suite. Anyone with VB6.0 knowledge should find them easy to work with. You can get demo's of both products from http://www.softwaretoolbox.com and they have example...