17. September 2015 | Leave a comment WinCC flexible as OPC Server this option is only available on Panel PC’s like IPC477C, on MP Panels, but not on KTP Panels. I’m using opctestclient from Rockwell Automation, but you can use any other OPC Client take a look here for OPC Clients http://www.opcconnect.com/freecli.php here a short and simple howto video: to activate WinCC flexible OPC Server option just follow this steps: Open WinCC flexible navigate to Device Settings->Device Settings And select the checkbox “Act as OPC Server” now just transfer this project to your HMI, or you can start runtime on your PC. Use some client to connect to WinCC flexible as OPC Server. finish