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Addressing system and method of master equipment to slave equipment

A technology of master equipment and equipment, applied in transmission systems, instruments, electrical digital data processing, etc., can solve problems such as wasting time and addressing errors, and achieve the effect of reducing errors and saving addressing time.

Inactive Publication Date: 2009-07-08
HONG FU JIN PRECISION IND (SHENZHEN) CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, if the RS485 bus control system contains hundreds or thousands of slave devices, using hardware to address each slave device will not only waste time, but may also cause addressing errors

Method used

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  • Addressing system and method of master equipment to slave equipment
  • Addressing system and method of master equipment to slave equipment
  • Addressing system and method of master equipment to slave equipment

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Embodiment approach

[0024] Please refer to Figure 5 , the addressing method of the master device to the slave device of the present invention is applied to figure 1 In the shown addressing system of the master device to the slave device, the preferred implementation of the addressing method of the master device to the slave device includes the following steps:

[0025] Step S1: The master device 10 sends a broadcast command to all the slave devices 20, 30 and 40, notifying all the slave devices 20, 30 and 40 to enter the addressing mode.

[0026] Step S2: The master device 10 reads the time allocation module in the RS485 bus device, and allocates a certain response time period to each numbered slave device.

[0027] Step S3: The slave device 20, 30 or 40 responds to the master device 10 with an address request within the response time period assigned to it by the master device 10, that is, the master device 10 is required to assign an identification address to it .

[0028] Step S4: After the...

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PUM

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Abstract

A system for a main device to address a slave device comprises a main device and a plurality of slave devices. The main device is connected to the slave devices through a bus device; the bus device comprises a broadcast module, a read module, a response module, an address distribution module and a first judge module; each slave device comprises an execution module and a request module; and the bus device comprises a time distribution module. The invention can carry out addressing without hardware such as a rotary type addressing switch, thereby reducing the time of manual addressing and errors of manual addressing.

Description

technical field [0001] The invention relates to an addressing system and method, in particular to a system and method for a master device to address a slave device. Background technique [0002] With the development of digital technology and the increasingly widespread application of computers, a system often consists of multiple computers, and it is necessary to solve the problem of multi-station and long-distance communication. RS485 bus technology is widely used when the communication distance is required to be tens of meters to thousands of meters. RS485 can realize point-to-multipoint communication, and can also realize multi-point two-way communication, but there can only be one transmitter at a time, and the rest are receivers, that is, a communication mode of one master and multiple slaves. [0003] The RS485 bus control system generally includes a master device, the master device, and multiple controlled devices, the slave devices. The information of the master dev...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F13/42G06F15/16H04L29/02
CPCG06F13/385
Inventor 赵国胜
Owner HONG FU JIN PRECISION IND (SHENZHEN) CO LTD