Selective industrial power-over-network configuration and operation

1. A system comprising:

a network connection;

a power connection adapted to receive first power from the network connection;

a first logic block in communication with the power connection, the first logic block configured to:

operate on the first power from the network connection when the first power is selectively provided to the first logic block; and

determine location information;

a second logic block different from the first logic block, the second logic block configured to run on second power in addition to the first power; and

control circuitry within the first logic block, the control circuitry in communication with the network connection, the power connection, the first logic block, and the second logic block, the control circuitry configured to:

receive a query from a requester over the network connection for the location information;

return the location information over the network connection to the requester; and responsive to receiving a location confirmation command from the requester, power-up the second logic block by causing the second power to be provided to the second logic block.

2. The system of claim 1 , where the first logic block comprises a network physical layer.

3. The system of claim 1 , where the network connection comprises a data receive connection; and

the first logic block is configured to receive the query on the data receive connection.

4. The system of claim 1 , where the first logic block is configured to receive the query modulated on the power connection.

5. The system of claim 1 , where the first logic block is further operable to receive location error information to display.

6. The system of claim 1 , where the first logic block is further operable to:

obtain the location information from a location logic block in the system.

7. The system of claim 6 , where the location logic block is configured to receive power from the power connection.

8. A system comprising:

a network connection;

a power controller coupled to the network connection;

control circuitry in communication with the network connection and the power controller, the control circuitry configured to:

determine that a specific logic block in a target industrial node is configured to provide location information for the target industrial node;

provide first power via the power controller over the network connection to the specific logic block in the target industrial node without causing the target industrial node to power-up in its entirety;

receive the location information responsive to providing the first power to the specific logic block; and

responsive to the location information, send a location confirmation message to the target industrial node to cause the target industrial node to obtain second power to cause the target industrial node to power-up additional circuitry other than the specific logic block.

9. The system of claim 8 , where the specific logic block is further configured to perform a selected task prior to power-up of the target industrial node in its entirety.

10. The system of claim 9 , where the selected task comprises a diagnostic task.

11. The system of claim 9 , where the selected task comprises a configuration task.

12. The system of claim 9 , where the selected task comprises a mode setting task for the target industrial node.

13. The system of claim 9 , where the selected task comprises a security task.

14. The system of claim 9 , where the selected task comprises a connectivity verification task.

15. The system of claim 8 , where the control circuitry is further configured to:

prior to providing first power over the network connection to the specific logic block in the target industrial node, provide third power over the network connection to an initial logic block in an initial industrial node;

request status information from the initial logic block;

in response to the request, determine that the initial industrial node has had a failure;

responsive to the failure:

disable the initial logic block of the initial industrial node by discontinuing provision of the third power; and

instead deliver the first power over the network connection to the specific logic block of the target industrial node.

16. The system of claim 15 , where the control circuitry is configured to determine that the initial industrial node has had the failure when the system receives an error status from the initial logic block.

17. The system of claim 15 , where the control circuitry is configured to determine that the initial industrial node has had the failure when there is a communication failure with the initial logic block.

18. A product comprising:

a machine-readable medium other than a transitory signal;

instructions stored on the machine-readable medium, the instructions, when executed, configured to cause a processor to:

cause power controller circuitry to provide first power over a network connection to a specific logic block within a target industrial node without causing the target industrial node to power-up in its entirety;

receive location information from the specific logic block responsive to providing the first power to the specific logic block; and

responsive to the location information, send a location confirmation message to the target industrial node to cause the target industrial node to obtain second power in excess of the first power to cause the target industrial node to power-up additional circuitry other than the specific logic block.

19. The product of claim 18 , where the instructions are further configured to cause the processor to request the location information by sending a query modulated over a power connection, the power connection coupled to the network connection and configured to supply the first power.

20. The product of claim 18 , where the instructions are further configured to cause the processor to receive location error information from the specific logic block for display.