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Operation method for main unit of intelligent electric appliance serial bus

A technology of intelligent electrical appliances and serial bus, applied in the direction of bus network, data exchange through path configuration, error prevention/detection using return channel, etc., can solve unsolved problems, etc., achieve fast data transmission speed, easy installation and use , the effect of saving manpower

Active Publication Date: 2009-01-14
ZHEJIANG PEOPLE ELE APPLIANCE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The prior art does not solve the technical problem of performing data communication functions between the master and slave smart appliances through the RS-485 interface specification

Method used

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  • Operation method for main unit of intelligent electric appliance serial bus
  • Operation method for main unit of intelligent electric appliance serial bus
  • Operation method for main unit of intelligent electric appliance serial bus

Examples

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Embodiment 1

[0027] See figure 1 , the smart appliance serial bus communication system of the present embodiment includes: a master smart appliance 1 and 3 (any value in other embodiments can be 1-30) slave smart appliances 3; a master smart appliance 1 and a slave smart appliance 3 are connected through RS-485 bus 2. The distance between the master smart appliance 1 and the slave smart appliance 3 is less than 1200 meters. The master smart appliance 1 and the slave smart appliance 3 include: a central processing unit and an RS-485 interface connected to the central processing unit. The master smart appliance 1 and the slave smart appliance 3 can be computers, or smart devices with single-chip microcomputers or embedded processors, such as multi-function printers and copiers, communication equipment, etc.

[0028] See image 3 , in order to extend the communication distance, a repeater 4 is provided between the master smart appliance 1 and the slave smart appliance 3 . In order to incr...

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Abstract

The invention relates to a working method of a communicating system, comprising: a main intellectual electrical appliance and an accessory intellectual electrical appliance, connected through an RS-485 bus; building data communication channels after searching the accessory intellectual electrical appliance by the main intellectual electrical appliance, then transmitting data package each other; transmitting an affirmed handshake package to the main intellectual electrical appliance after the accessory intellectual electrical appliance receives correct data; transmitting a unaffirmed handshake package to the accessory intellectual electrical appliance after the accessory intellectual electrical appliance receives error data, and retransmitting a data package to the accessory intellectual electrical appliance by the main intellectual electrical appliance; transmitting the affirmed handshake package to the accessory intellectual electrical appliance after the main intellectual electrical appliance receives the correct data; transmitting the unaffirmed handshake package to the accessory intellectual electrical appliance when the main intellectual electrical appliance receives the error data, wherein the accessory intellectual electrical appliance retransmits a data package to the main intellectual electrical appliance; cancelling the data communication channel when the main intellectual electrical appliance transmits a channel cancelling package to the accessory intellectual electrical appliance.

Description

technical field [0001] The invention relates to a working method of an intelligent electrical appliance with an intelligent electrical appliance serial bus. Background technique [0002] In the prior art, there are many ways to connect the slave smart appliances with the master smart appliances. For example, a USB interface is used. The disadvantage of this method is that the data transmission distance of the USB interface is 1-2 meters, which cannot meet the needs of practical applications. At the same time, the number of USB devices that can be plugged into the USB interface is often only a few, which affects the use of users. [0003] Chinese patent literature publication number CN2566355 discloses a serial management bus interface module used in a serial bus cluster network management system, which includes a standard 485 chip, and two protection resistor. Using its serial management bus interface module, no matter what the type of load at the end of the network is, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L12/40H04L1/16
Inventor 高文乐余定辉
Owner ZHEJIANG PEOPLE ELE APPLIANCE
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