System and method for automatically distributing address via bus

Abstract

The invention provides a system and a method for automatically distributing an address via a bus. The system comprises a computer mainframe, the bus, and N equipment which are connected with the computer mainframe via the bus. The computer mainframe is used for transmitting an enabling and broadcasting instruction to the first equipment connected with the mainframe and activating the communication of the first equipment; the computer mainframe sets the first equipment as slave equipment and sets the communication address of the first equipment; the first equipment which has been set with the communication address is converted into the mainframe and is used for transmitting the enabling and broadcasting instruction to the second equipment which is connected with the first equipment and which has not been set with the communication address; the first equipment sets the second equipment as the slave equipment and sets the communication address of the second equipment; so iterating until the N-1 equipment sets the communication address of the N equipment. By setting the communication address of the equipment via software, the maintenance cost of an operator is reduced and electronic supplies expenses of a hardware toggle switch are saved.

Description

technical field [0001] The invention relates to the field of industrial control and data communication, in particular to a system and method for automatically assigning addresses through a bus. Background technique [0002] In the field of industrial control and data communication, in order to control several or dozens of devices, buses (such as RS485 bus) are often used to organize these devices into corresponding industrial control device networks, such as figure 1 shown. In order to achieve independent control of each device, it is necessary to set the address of the device, such as 1, 2, 3...N, etc. The address of the device is unique in the industrial control device network. like figure 2 As shown, the traditional address setting method is to use hardware binary DIP switches. The DIP switch is actually composed of 8 small white switches as shown in the figure, and 1 to 8 small white switches respectively represent bits 1 to 8 of an unsigned integer byte. image 3 ...

AI Technical Summary

Problems solved by technology

However, the hardware binary dial switch is a physical switch, which cannot prevent damage caused by external complex environmental factors such as humidity, wind and rain. At the same time, the operator needs to manually set each device when installing the device, which increases the operation and maintenance costs.

In addition, if you need to change the mobile device, you need to manually set the address value again

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