| change_mask | Indicates which parameters have been changed since the last function call. If a bit is set the corresponding parameter has been changed since the last update. 
| Bit Index | Value (Hex) | Parameter |  
| 0 | 0x01 | events |  
| 1 | 0x02 | availability |  
| 2 | 0x04 | avail_info |  
| 3 | 0x08 | avail_trans_cause |  
| 4 | 0x10 | node_address |  
| 5 | 0x20 | node_position |  
| 6 | 0x40 | max_position |  
| 7 | 0x80 | packet_bw |  | 
    | events | The occurred network events. Events are only indicated once they occurred. I.e., the value is not handled as a continuous state. You can use the bitmask UCS_NETWORK_EVENT_NCE to identify received events. | 
    | availability | The network availability. | 
    | avail_info | The availability information. | 
    | avail_trans_cause | The availability transition cause. 
|  | AvailabilityTransitionCause |  | 
    | node_address | The current node address. | 
    | node_position | The current node position. | 
    | max_position | The number of available nodes. | 
    | packet_bw | The packet bandwidth. | 
    | user_ptr | User reference provided in Ucs_InitData_t::user_ptr |