Reliable messaging instruction
First Claim
1. An industrial controller that facilitates decoupled transmission of messages between a sender and a recipient in an industrial automation environment, comprising:
- a processor;
a memory device communicatively coupled to the processor, the memory device having stored therein computer-executable components configured to implement the industrial controller, including a first broker, residing on the industrial controller, that receives and stores a message generated by the industrial controller in a message data queue, and delivers the message to at least one entity subscribed to receive the message in accordance with at least one notification policy specified by the at least one entity, wherein the first broker receives a schema from the industrial controller defining a format for the message and publishes the schema to a message revision queue.
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Abstract
The subject invention provides reliable messaging with and within a control environment. The systems and methods utilize a message broker that facilitates message exchange. The message broker can be located within an industrial controller, as a dedicated entity within a control environment and/or an entity external to the control environment. Messages transmitted from an industrial controller and/or the external entity can be routed through the message broker prior to reaching a destination, wherein the message can be stored in the message broker and subsequently obtained by a recipient. The message broker decouples the message sender (e.g., an industrial controller, an external entity . . . ) from the message recipient (e.g., an industrial controller, an external entity . . . ) such that messages can be successfully transmitted (to the message broker) regardless of a state of the recipient, and messages can be retrieved (from the message broker) regardless of a state of the sender.
221 Citations
20 Claims
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1. An industrial controller that facilitates decoupled transmission of messages between a sender and a recipient in an industrial automation environment, comprising:
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a processor; a memory device communicatively coupled to the processor, the memory device having stored therein computer-executable components configured to implement the industrial controller, including a first broker, residing on the industrial controller, that receives and stores a message generated by the industrial controller in a message data queue, and delivers the message to at least one entity subscribed to receive the message in accordance with at least one notification policy specified by the at least one entity, wherein the first broker receives a schema from the industrial controller defining a format for the message and publishes the schema to a message revision queue. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 20)
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11. A method for decoupled delivery of messages in an industrial control environment, comprising:
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receiving, at a broker residing on an industrial controller, a message from the industrial controller; storing the message in a message data queue; receiving, at the broker, a schema, from the industrial controller, specifying a format for the message; storing the schema in a message revision queue; and delivering, by the broker, the message and the schema, according to at least one notification policy, to at least one entity subscribed to receive the message. - View Dependent Claims (12, 13, 14, 15, 16, 17)
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18. A non-transitory computer-readable medium having stored thereon computer-executable components that, in response to execution, cause a broker residing on an automation controller to perform operations, including:
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receiving a message generated by the automation controller;
storing the message in a message data queue;
receiving a schema indicating a format of the message;publishing the schema in a message revision queue; and delivering the message and the schema according to at least one notification policy to at least one entity subscribed to receive the message. - View Dependent Claims (19)
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Specification