Central air-conditioning control method and device based on BACnet (building automation control net) object ID (identification)

Abstract

The invention relates to a central air-conditioning control method based on BACnet (building automation control net) object ID (identification). According to the method, the BACnet object ID is defined, communications information transfer is carried through a BACnet gateway among equipment based on BACnet protocols, the BACnet object ID is shown in communication messages of the information transfer, and the state of controlled equipment is judged according to the comparison between each section of binary codes of the ID and the form of the defined BACnet object ID. The invention also relates to a central air-conditioning control device using the control method. The instance number part of the defined BACnet object ID is further defined, the specific identity information of the equipment is shown, one BACnet gateway can be used for transferring the communication of a plurality of devices and a control center, the gateway cost is saved, and the engineering wiring is simplified.

Description

technical field [0001] The invention relates to the field of intelligent building control systems, in particular to a central air-conditioning control method and device based on a BACnet object ID. Background technique [0002] Central air-conditioning system, elevator monitoring system, lighting system, power transformation and distribution system, fire monitoring, security monitoring, etc. are integrated in the intelligent building system using the BACnet protocol. In theory, each individual product has its own BACnet protocol interface for connection. into the intelligent building system. But usually, many products do not consider the issue of building integration in the design stage. Once there is such a need, the usual practice is to add a BACnet gateway, which is equivalent to a router, to process and transfer the original product, thereby providing BACnet Protocol interface, and there is often a need to transfer multiple similar and similar products through the same ...

AI Technical Summary

Problems solved by technology

In this way, it is difficult to distinguish which type of device the controlled object belongs to when transferring multiple devices at the same time through the BACnet gateway. When doing integration, it is not clear what device parameters are read or modified, and the purpose of integration cannot be achieved.

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