In OPC-UA, the component attempts to detect whether a debugger is attached to the application, and if so, it uses a different, much slower keep-alive interval (this keep-alive interval is controlled by the UAClientSessionParameters.KeepAliveIntervalDebug property, and defaults to 1 day). This allows the developer to break into the debugger and examine the status of the program, without causing the OPC-UA sessions be disconnected due to the fact that keep-alives are not being exchanged while the execution is suspended.