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RS485 bus ad hoc network full duplex communication system and automatic addressing method thereof

A technology of RS485 and communication system, which is applied in the field of full-duplex communication system of RS485 bus self-organizing network and its automatic address addressing, which can solve the problems of reducing the operating efficiency of the system, so as to improve the addressing efficiency, reduce the impact, and reduce the difficulty of maintenance Effect

Active Publication Date: 2021-08-17
UNIV OF ELECTRONICS SCI & TECH OF CHINA +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The addressing command issued by the master requires each slave to respond, and then continues to address the subsequent slaves, which will also reduce the operating efficiency of the system

Method used

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  • RS485 bus ad hoc network full duplex communication system and automatic addressing method thereof
  • RS485 bus ad hoc network full duplex communication system and automatic addressing method thereof
  • RS485 bus ad hoc network full duplex communication system and automatic addressing method thereof

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Embodiment Construction

[0021] The technical scheme of the present invention is further described below, but the scope of protection is not limited to the description.

[0022] Such as figure 1 As shown, a RS485 bus ad hoc network full-duplex communication system includes a host terminal and a slave terminal. One master terminal, several slave terminals, each terminal contains two independent RS485 interfaces: interface A and interface B. Starting from the master terminal interface B, connect to the first slave terminal interface A, the first slave terminal interface B connects to the second slave terminal interface A, subsequent slave terminals are connected in this way in turn, and the last slave terminal interface B Connect to host terminal interface A. Among them, there is no fixed requirement on the position of the master terminal and each slave terminal, and the terminal interface B of this level is connected to the terminal interface A of the lower level, and all terminals are connected in s...

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Abstract

The invention provides an RS485 bus ad hoc network full duplex communication system and an automatic addressing method thereof. The system comprises a plurality of terminals, each terminal is provided with two interfaces, the interfaces among the plurality of terminals are sequentially connected in series to form a closed loop, one of the plurality of terminals is provided with a host terminal, and the rest terminals are slave terminals. The host and the slaves are connected in series to form an annular networking structure, hardware redundancy design is carried out on the system, and the reliability of the system is improved; an assembly line addressing mode is adopted, so that the addressing efficiency of the system is improved; a new terminal automatically performs network access discrimination, and a fault and a removed device automatically go out of the network, so that the complexity of system erection and use is simplified; the Bypass function of the RS485 interface of the terminal reduces the influence of the single-machine fault on the whole system network, ensures the reliable operation of the system network, and reduces the maintenance difficulty.

Description

technical field [0001] The invention relates to an RS485 bus ad hoc network full-duplex communication system and an automatic address addressing method thereof. Background technique [0002] Most of the existing ad hoc networks have a network structure of one master and multiple slaves, and can only be a network structure of one master and multiple slaves. If the master is damaged, the entire system communication network will be paralyzed; if there are two or more slaves sending data to the bus at the same time, it will cause bus conflicts and communication errors. Therefore, the intelligence uses the master to initiate communication according to the address of the slave, which greatly affects the communication efficiency. [0003] In order to prevent the paralysis of the host computer from causing the paralysis of the whole system, such as a ring network based on RS485 bus with the patent number CN 110034991A, the host terminal and the slave terminal use two independent RS...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L12/40H04L12/42H04L12/24
CPCH04L12/40006H04L12/42H04L41/0663
Inventor 谭伟
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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