Patent ID: 8725298
Filing Date: 2014-05-13
Classification: F24F

Abstract:
1. An HVAC data processing and communication network, comprising: a subnet controller configured to publish control messages over a data bus; a plurality of system devices, each device being configured to communicate over said data bus and including an HVAC component and a local controller configured to receive said control messages and in response thereto, to directly control said HVAC component to heat, cool, humidify, dehumidify or move air; and a gateway configured to provide access by a remote user to said network, said access including placing a subset of said system devices, by one of said system devices, in a dedicated diagnostic mode for a predetermined time, operating said network to generate system device diagnostic data and retrieving said diagnostic data via said gateway, wherein said operating includes facilitating an exchange of messages between said subset of said system devices and said gateway over said data bus, said messages being privileged diagnostic messages having higher priority than periodic device status messages sent by said system devices during normal operations thereof.