Vb.net 2015 and opc

Hello everybody

i must develop an application with vb.net wich will communicate with opc server ( rslinx or kepserver ) have anyone already try it or have the code for that

thanks

What PLC are you communicating with?

hello

i am working with micrologix 1100.

thanks for replying

So here are a couple options:

1) Use an OPC server which can be complicated to program and will cost for every run time. You can see an example of what it takes to read a value here in this thread:

http://www.plctalk.net/qanda/showthread.php?t=97862

2) You can use AdvancedHMI, which is a Visual Studio solution, that has a native driver for the ML1100, only requires one line of code to read a value, is much faster, and does not require a run time license nor a development license. Here is a quick example of how to read a value in code:

Dim value as string=EthernetIPforSLCMicroCom1.Read("N11:0")

Depending on what your objective is, you can build complete HMI's without writing any code. The fully functional base package is completely free.

HI archie


thanks a lot,i downloaded advancedhmi and its working perfectly with the driver Ethernetipforslcmicrocom1.

have you any idea about communication using schnedeir modicon m340 plc ??

Use Modbus TCP. It also works great.

If you are looking for an OPC server check there out

http://www.ingeardrivers.com/index.htm

they also have an active X control for VB Net that works well
the active X in runtime free
I have been using then for years work well and the cost is not bad

To answer the original question, this website has a lot of info regarding writing OPC clients with .NET:
http://www.opcconnect.com/dotnet.php

Check out this OPC .net client toolkit
http://integrationobjects.com/products/opc-client-toolkits/opc-net-client-toolkit/

It works with VB .Net and is runtime license-fee free.

Maybe is not 100% related but last week I had problems connecting an OPC server from videojet called Clarinet to my client (FT view SE V8.0), I found this page with good white papers and good videos, I used them and resolved my problems.
http://www.opcti.com/default.aspx