I am testing OPC server connection in the TRACE Mode 6.0 free version. I have installed OPC server in the PC. The OPC server is connected to the HART device simulator. Sending and receiving command's list is appearing in the log display of HART simulator. That is mean HART simulator, and RTM.exe are changed data. However, dynamic text value is linked to OPC PV (SV, TV, QV ) variable is not changed in the display. Always value is 0. However, dynamic text value is changed when the sinus generator is linked to the dynamic text.