While the parameter file is set on workflow level, the logging thereof is not. You can get the parameter values relevant to a session by setting the "Override tracing" in the "Error handling" section of the "Config Option" tab of the session properties to "Verbose init". With "Verbose data" you also get the parameter values logged, however, it is not advisable to set it unless for debugging as it writes the values of each processed record in each transformation to the log this making it explode and slow down the process to tears.
