System Event IDs (0xFFxx)
Default services that have to be supported by all nodes on the bus.
Presence Service (0xFF00)
The request forces all nodes on the bus to send a (P2P) response to the requesting node. If the node has no bus address assigned yet it will respond with the default NodeId (0x1FFF). The default NodeId can not be used to address a node directly.
Parameters: none
Response: (response)
| ID0 | ID1 | D0 | D1 | D2 | D3 | D4 | D5 |
| 0xFF | 0xFE | UID0 | UID1 | UID2 | UID3 |
- UID is the unique ID of the node. Usually this is a serial number and/or the production date of the hardware.
Assign NodeId (0xFFFE)
Assign a bus ID to a node. The receiver node is addressed by the unique vondor identification (VID/UID) in the data frame.
Parameters:
| D0 | D1 | D2 | D3 | D4 | D5 |
| UID0 | UID1 | UID2 | UID3 | NodeId0 | NodeId1 |
- UID is the unique ID of the node. Usually this is a serial number and/or the production date of the hardware.
- NodeId is the new bus ID of the node.