OPC

With this article I want to show how to create a webservice in C# to communicate with an OPC-XML-DA server, like the one of SIMOTION D plc. OPC-XML-DA is a communication protocol based on SOAP and XML. To connect to a OPC-XML-DA server you need a WSDL file, that defines ...

AdvancedHmi is a free and “almost open-source” HMI framework written in VB.Net that offer some drivers for PLCs, and also offer free SCADA objects for winforms users. I say “almost open-source” because the code of the two main libraries is not provided (MfgControl.AdvancedHMI.Drivers.dll and MfgControl.AdvancedHMI.Controls.dll), but it’s provided how to ...

I made a video where i explain how to connect and read tags from and Opc server using OpcNetApi.dll library with C#. This post follows a serie of old article that you can read on my old blog. This code comes from Beckhoff OPC how-to section and if you run a ...

Usually when i have to analyze OPC Servers connectivity i use RsLinx OPC test client. This is a software provided for free in every version of RsLinx (it’s included in the lite too) and you can download RsLinx lite following the procedure described here. Using the OPC test client is ...