The terms input and output refer to the point of view of the scanner device.
Output data is produced by the scanner and consumed by the adapter. Input data is produced by the adapter and consumed by the scanner. The Kinetix® 300 drive is an adapter device and the controller, by using RSLogix 5000® software or the Studio 5000 Logix Designer® application, is a scanner device.
When a Kinetix 300 drive parameter is changed by using explicit messaging,the Set Attribute Single message instruction is directed at this class, the instance is the identifier of the actual parameter and the attribute depends upon the type of data being written.