Communication protocol system and method for a distributed-architecture heating, ventilation and air conditioning network
First Claim
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1. An HVAC data processing and communication network, comprising:
- a data bus having a plurality of HVAC devices coupled thereto, forming a subnet; and
a first subnet controller integral with a system device of said plurality of HVAC devices and configured to transition from a reset state to a first state that includes pre-startup tasks, transition from said first state to a second state that includes arbitrating with at least a second subnet controller coupled to said data bus to determine an active subnet controller for controlling said subnet, and transition from said second state to a third state that includes operating as said active subnet controller or as a passive subnet controller of said subnet based on said arbitrating, wherein said first state further includes sending start-up messages to at least some of said plurality of HVAC devices and said third state includes waiting for configuration parameters from said active subnet controller when operating as said passive subnet controller.
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Abstract
The disclosure provides an HVAC data processing and communication network and a method of manufacturing the same. In an embodiment, the network includes a first subnet controller and a system device. The first subnet controller is coupled to a data bus and configured to arbitrate with a second subnet controller for control of the subnet. The system device is configured to transition from a reset state to a first state that includes pre-startup tasks, and transition from the first state to a second state that includes waiting for the subnet controller to provide configuration parameters to the system device.
1339 Citations
20 Claims
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1. An HVAC data processing and communication network, comprising:
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a data bus having a plurality of HVAC devices coupled thereto, forming a subnet; and a first subnet controller integral with a system device of said plurality of HVAC devices and configured to transition from a reset state to a first state that includes pre-startup tasks, transition from said first state to a second state that includes arbitrating with at least a second subnet controller coupled to said data bus to determine an active subnet controller for controlling said subnet, and transition from said second state to a third state that includes operating as said active subnet controller or as a passive subnet controller of said subnet based on said arbitrating, wherein said first state further includes sending start-up messages to at least some of said plurality of HVAC devices and said third state includes waiting for configuration parameters from said active subnet controller when operating as said passive subnet controller. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A method of manufacturing an HVAC data processing and communication network, comprising:
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coupling a first subnet controller to a data bus having a plurality of HVAC devices coupled thereto and forming a subnet, wherein said first subnet controller is configured to transition from a reset state to a first state that includes pre-startup tasks, transition from said first state to a second state that includes arbitrating with at least a second subnet controller coupled to said data bus to determine an active subnet controller for controlling said subnet, and transition from said second state to a third state that includes operating either as said active subnet controller or as said passive subnet controller of said subnet based on said arbitration, wherein said first subnet controller is integral with a system device of said plurality of HVAC devices; and wherein said first state further includes sending start-up messages to at least some of said plurality of HVAC devices and said third state includes waiting for configuration parameters from said active subnet controller when operating as said passive subnet controller. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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15. An HVAC data processing and communication network system device that is capable of performing an air handling function, comprising:
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an integral local controller capable of controlling an HVAC subnet; and a physical layer interface adapted to couple said local controller to a data bus of said HVAC subnet wherein said local controller is configured to transition from a reset state to a first state that includes pre-startup tasks, transition from said first state to a second state that includes arbitrating with other subnet controllers coupled to said data bus to determine an active subnet controller for controlling said subnet, and transition from said second state to a third state that includes operating either as said active subnet controller or as a passive subnet controller of said subnet based on said arbitrating, wherein said first state further includes sending start-up messages to at least some of said plurality of HVAC devices and said third state includes waiting for configuration parameters from said active subnet controller when operating as said passive subnet controller. - View Dependent Claims (16, 17, 18, 19, 20)
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Specification