Status signal output
AssigneeWAGO Verwaltungsgesellschaft mbH
InventorsDaniel Jerolm, Hans-Herbert Kirste, Frank Schadde, Gerald Huse
Life of this patent
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Abstract
A data bus subscriber connected to a local bus, particularly a ring bus. The data bus subscriber has a status signal input for receiving a first status signal value from a downstream data bus subscriber or a terminator, a status signal output for providing a second status signal value to an upstream data bus subscriber or to a local bus master, wherein the data bus subscriber is adapted to provide the second status signal value based on a logical link of a communication readiness of the data bus subscriber and the first status signal value. The invention further relates to a corresponding method and a local bus.
Claims20
A data bus subscriber connected to a local bus, the data bus subscriber comprising:
- a processing unit;
- a status signal input for receiving a first status signal value from a downstream data bus subscriber or a termination unit of the local bus;
- and
- a status signal output for providing a second status signal value to an upstream data bus subscriber or to a local bus master,
- wherein the data bus subscriber is adapted to provide the second status signal value based on a logical linkage between a communication readiness of the data bus subscriber and the first status signal value such that the logical linkage indicates that the downstream data bus subscriber or the termination unit are ready to communicate and that the processing unit is ready for communication.
A method for operating a data bus subscriber connected to a local bus, the method comprising:
- receiving a first status signal value at the data bus subscriber from a downstream data bus subscriber or from a termination unit of the local bus;
- providing a second status signal value to an upstream data bus subscriber or to a local bus master by the data bus subscriber, the providing further comprising logically linking a communication readiness of the data bus subscriber and the first status signal value to provide the second status signal value, the logical linking indicating that the downstream data bus subscriber or the termination unit are ready to communicate and that the data bus subscriber is ready for communication.
A local bus, the local bus comprising:
- at least one data bus subscriber having a status signal input and a status signal output;
- and
- a termination unit having a status signal output,
- wherein the status signal output of the termination unit and the status signal input of the data bus subscriber are connected,
- wherein the termination unit is adapted to provide a first status signal value to the status signal output of the termination unit that is received at the status signal input of the data bus subscriber, and
- wherein the data bus subscriber is adapted to provide a second status signal value at the status signal output of the data bus subscriber based on the communication readiness of the data bus subscriber and the received first status signal value at the status signal input of the data bus subscriber.
Dependencies are inferred from the claim text.