Defines which Driver is used by this I/O Driver object to communicate with a device. This property accepts a String with the complete Driver's path, in case it is not in the same Domain's directory, or the relative Driver's path if it is in the same Domain's directory. In case there is no open Domain in Elipse Power Studio, a relative path is considered as starting from the folder where the project or library containing the Driver object is. After that, the DriverName property changes to the Driver's description. This property cannot be modified once communication starts. Default value is an empty String.