초록 ▼

A method and system for addressing nodes in a multi-drop wired network are disclosed. In an embodiment nodes communicate via a two-way communication bus. Upon receipt of an address command, a first node assigns itself a first address, closes a switch to activate an output port of the first node to e

A method and system for addressing nodes in a multi-drop wired network are disclosed. In an embodiment nodes communicate via a two-way communication bus. Upon receipt of an address command, a first node assigns itself a first address, closes a switch to activate an output port of the first node to enable a second node to receive communications from the first node, and sends a second address onto the two-way communication bus. The second address is received by all previously addressed nodes, including a controller if used, as well as the second node, which is as yet unaddressed. Upon receipt of the second address, the second node repeats the process. If a node does not receive an acknowledgement that a subsequent node has addressed itself, that node deactivates its output port and terminates the network.

대표청구항 ▼

1. A method of assigning an address to a node of a multi-drop wired network, wherein each node of the multi-drop wired network can connect to a two-way communication bus via an input port and an output port, the method comprising: receiving at an input port of a first node a first address, where the

1. A method of assigning an address to a node of a multi-drop wired network, wherein each node of the multi-drop wired network can connect to a two-way communication bus via an input port and an output port, the method comprising: receiving at an input port of a first node a first address, where the input port of the first node is connected to the communication bus;assigning the first address to the first node;activating an output port of the first node to enable a second node to receive communications from the first node via the communication bus;determining a second address based on the first address; andsending the second address onto the communication bus via both the input port of the first node and the output port of the first node. 2. The method of claim 1 further comprising receiving an address subsequent to the second address at the first node via the communication bus. 3. The method of claim 1 further comprising receiving the second address at a controller. 4. The method of claim 1 wherein activating an output port of the first node to enable a second node to receive communications from the first node via the communication bus comprises closing one or more switches. 5. The method of claim 4 wherein the one or more switches are selected from a group comprising a solid state switch and an electromechanical relay. 6. The method of claim 1 wherein the first node is selected from a group comprising a DALI node, an EIA-RS485 node, and EIA-RS232 node, an EIA-RS422 node, an EIA-RS423 node, an inter-integrated circuit node, and a controller-area network node. 7. The method of claim 1 further comprising deactivating the output port of the first node and terminating the multi-drop wired network at the first node. 8. The method of claim 1 further comprising deactivating the output port of the first node in response to a message received from a controller via the communication bus. 9. The method of claim 8 wherein a message received from a controller via the communication bus is received periodically. 10. The method of claim 1 further comprising deactivating the output port of the first node and biasing the multi-drop wired network at the first node. 11. The method of claim 1 wherein the first address is sent onto the communication bus by a controller. 12. The method of claim 1 further comprising receiving at an input port of the second node the second address, where the input port of the second node is connected to the communication bus;assigning the second address to the second node;sending a response message via the communication bus from the second node to the first node. 13. The method of claim 1 further comprising sending a message via the communication bus from the first node to a controller. 14. The method of claim 1 wherein the first node is a group node, the method further comprising: activating a second output port of the first node to enable a third node to receive communications from the first node via a second two-way communication bus;determining a third address; andsending the third address onto the second communication bus via the second output port of the first node. 15. A system for addressing one or more nodes of a multi-drop wired network comprising: a controller connected to a two-way communication bus;a plurality of nodes, each having an input port and an output port for connecting to the communication bus;at each node, one or more switches connecting the input port of the node to the output port of the node;wherein the controller communicates a first address via the communication bus to a first node, which connects to the communication bus through an input port of the first node;the first node activates the output port of the first node by setting one or more switches between the input port of the first node and the output port of the first node to the ON position; andthe first node communicates a second address onto the communication bus through both the input port of the first node and the output port of the first node. 16. The system of claim 15 wherein the plurality of nodes is selected from a group comprising DALI nodes, EIA-RS485 nodes, EIA-RS232 nodes, EIA-RS422 nodes, EIA-RS423 nodes, inter-integrated circuit nodes, and controller-area network nodes. 17. The system of claim 15 further comprising a group node having an input port connected to the communication bus, a first output port for connecting to the communication bus, and a second output port connected to a second two-way communication bus;at the group node, one or more switches connecting the input port of the group node to the first output port of the group node;wherein the group node receives through the input port of the group node connected to the communication bus a third address;the group node activates the first output port of the group node by setting one or more switches between the input port of the group node and the first output port of the group node to the ON position;the group node communicates a fourth address onto the communication bus through both the input port of the group node and the first output port of the group node; andthe group node communicates a fifth address onto the second communication bus through the second output port of the group node. 18. The system of claim 15 wherein the first node receives an address subsequent to the second address via the communication bus.