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Data processing method and system of BACnet protocol stack in compatible with Modbus protocol

A protocol stack and protocol technology, which is applied in the field of network communication and can solve problems such as control network and Internet communication barriers.

Inactive Publication Date: 2017-09-29
GREE ELECTRIC APPLIANCES INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, in the prior art, the two protocols have not been freely converted to each other, so that there are communication obstacles in the interconnection between the control network and the Internet

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  • Data processing method and system of BACnet protocol stack in compatible with Modbus protocol
  • Data processing method and system of BACnet protocol stack in compatible with Modbus protocol
  • Data processing method and system of BACnet protocol stack in compatible with Modbus protocol

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Embodiment Construction

[0028] In order to enable those skilled in the art to better understand the technical solutions in the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described The embodiments are only some of the embodiments of the present application, but not all of them. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts shall fall within the scope of protection of this application.

[0029] The application provides a data processing method compatible with the BACnet protocol stack of the Modbus protocol, the method comprising:

[0030] S1: When the host computer performs read and write attribute operations on the BACnet protocol stack, it sends a UDP data frame to the Internet;

[0031] S2: After the BACnet pr...

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Abstract

The invention provides a data processing method and system of a BACnet protocol stack in compatible with a Modbus protocol. The method comprises the following steps: an upper computer sends a UDP data frame to the internet when performing a read-write attribute operation on the BACnet protocol stack; after receiving the UDP data frame, the BACnet protocol stack resolves an object ID in the UDP data frame into an equipment address and a start address in a Modbus data frame, and resolves the current value of the UDP data frame into the data length and valid data in the Modbus data frame; the BACnet protocol stack sends the resolved information to a Modbus library; and the Modbus library sends the resolved information to each unit in a Modbus data frame format. By using the technical scheme provided by the invention, the free conversion between the Modbus protocol and a BACnet protocol can be performed.

Description

technical field [0001] The invention relates to the technical field of network communication, in particular to a data processing method and system of a BACnet protocol stack compatible with the Modbus protocol. Background technique [0002] Modbus is an application-layer messaging protocol on layer 7 of the OSI model that provides client / server communication between devices connected to different types of buses or networks. Serial link Modbus usually uses a master-slave technique, ie only one device (the master) can initiate a transfer (query or control). [0003] At present, BACnetIP is an open building equipment automatic control network data communication protocol. With the development of the Internet in the communication field, the interconnection between the control network and the Internet is an inevitable trend. However, in the prior art, the two protocols have not been freely converted to each other, so that there are communication obstacles in the interconnection ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L29/06H04L29/08H04L12/40
CPCH04L69/08H04L12/40H04L69/164H04L69/22H04L69/30H04L2012/40228
Inventor 闫满意牟桂贤申伟刚刁作清
Owner GREE ELECTRIC APPLIANCES INC
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