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Field bus communication method based on RS485 interface

A technology of field bus and communication method, which is applied in the direction of bus network, data exchange through path configuration, digital transmission system, etc., which can solve the problems of high cost and high price, and achieve low cost, strong anti-interference ability and easy control strategy Understand the effect

Inactive Publication Date: 2018-10-12
佛山金皇宇企业孵化器有限公司 +1
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  • Application Information

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Problems solved by technology

These bus protocols are supported and monopolized by large companies, and their interfaces are mainly used in the field of high-speed and high-precision control, with high cost and high price.

Method used

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  • Field bus communication method based on RS485 interface
  • Field bus communication method based on RS485 interface
  • Field bus communication method based on RS485 interface

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Embodiment Construction

[0030] In order to further understand the features, technical means, and specific objectives and functions achieved by the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0031] as attached Figure 1-3 As shown, the present invention discloses a field bus communication method based on RS485 interface, adopts ARM microcontroller and FPGA hardware platform to form a master station, and completes the coordinated scheduling and control strategy of the entire bus. The master station communicates with the slave station through the RS485 bus. The master station has the master station application layer, the master station data link layer and the master station physical layer. The ARM microcontroller realizes the function of the master station application layer through programming, and the FPGA hardware platform The function of the data link layer is realized through logic desig...

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Abstract

The invention discloses a field bus communication method based on a RS485 interface. A main station is built with an ARM microcontroller and an FPGA hardware platform; the main station is in a communication connection with a slave station through a RS485 bus; the main station has a main station application layer, a main station data link layer and a main station physical layer; the main station application layer is used for calling a program of a Linux driving layer through an API function; the main station application layer is in a communication connection with the main station data link layer through a GPMC bus; the data link layer is in a communication connection with the main station physical layer through a bus; and the main station physical layer is used for transmitting a signal byadopting a RS485 interface converting chip. Through adoption of the field bus communication method, real-time and reliable communication in the field of automatic control can be met. The field bus communication method has the characteristics of flexible connection manner, understandable control strategy, simple underlying driving, high interference resistance and the like.

Description

technical field [0001] The invention belongs to the field bus communication field, in particular to a field bus communication method based on an RS485 interface. Background technique [0002] With the advancement of the full digitalization of industrial production, industrial automation control has gradually transformed from the simple motion control originally undertaken to a fully digital manufacturing platform, from a single control unit that was independent of each other to one that requires mutual collaboration. The multi-unit control system, which puts forward new challenges and requirements for the communication mode of multi-unit cooperative work. The emergence of fieldbus technology just provides an effective solution for the whole process of digital manufacturing. Fieldbus technology has the characteristics of flexible connection, reliable system, and large data transmission volume. It can not only realize high-speed and high-precision motion control, but also quic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L12/40H04L12/44
CPCH04L12/40006H04L12/40078H04L12/44
Inventor 周俊伍
Owner 佛山金皇宇企业孵化器有限公司
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