title: Write my own OPC
body: <p>I have some questions about implementation of OPC : </p></p>
  
  <ul>
  <li>Can I write my own OPC server and OPC client for a PLC that want to send and receive real-time data to the server ?? </p>
  How much is easy for a undergraduate student ??!! </p></li>
  <li>Or can I use free software for the server (for example "<em>MartikonOPC Explorer</em>") and for the client to connect to the PLC ?? </p></li>
  <li><strong>Which Programming language can I use ?</strong> </p></li>
  </ul>
  
  <p>====================================== </p>
  review : </p></p>
  
  <ul>
  <li>PLC model : Delta</li>
  </ul>