1 2 3 4 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 0 1 2 3 4 Basic Aggregator Aggregates a collection of models for a given model id AID Aggregated model id N Number of aggregated models UN Update Number. Incrementing number each time the mapping is changed. If the number is not changed from the last reading the direct access to a specific offset will result in reading the same logical model as before. Otherwise the entire model must be read to refresh the changes Status Enumerated status code Vendor Status Vendor specific status code Event Code Bitmask event code Vendor Event Code Vendor specific event code Control Control register for all aggregated devices Vendor Control Vendor control register for all aggregated devices Control Value Numerical value used as a parameter to the control