The PROFIdrive Drive Model is defined in [PI 3172 PDP] and defines the “Drive Object” (DO) as the main architectural element. The DO is the representative for the Drive Axis functionality further defined in [PDP] and is also used to represent additional auxiliary drive functionality like Infeed, Encoder and Control Units as an option. Therefore, being the main architectural object, the DO is used for the addressing of different axis within a Drive Device, by using the unique DO-ID or the assigned PROFINET module number. Figure 1 shows the PROFIdrive device model, where the P-Device represents the PROFINET Device hosting the Drive Objects as representatives for a Drive Axis functionality. The Drive Unit is used for internal Device structuring only and is not of further relevance for the functional information model.

Figure 1 – General PROFIdrive drive model [PI 3172 PDP]