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Ethernet communication master station implementation method

A technology of a communication master station and an implementation method, which is applied in the field of Ethernet, can solve problems such as poor bus stability, data frame loss, bus synchronization failure, etc., and achieve the effect of ensuring consistency

Inactive Publication Date: 2012-10-17
SHANGHAI SANY PRECISION MACHINERY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The soft master station realized by this method often has communication errors such as bus synchronization failure and data frame loss during operation, especially when the real-time performance of the operating system is not high, the bus stability is even worse

Method used

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  • Ethernet communication master station implementation method
  • Ethernet communication master station implementation method
  • Ethernet communication master station implementation method

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Embodiment Construction

[0041] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments, but not as a limitation of the present invention.

[0042] Such as figure 1 A schematic diagram of the structure of the Ethernet communication master station in the realization method of the Ethernet communication master station shown, including Ethernet, master station and slave station, the master station is connected to the Ethernet through the connecting device, and connected to the master station through the Ethernet The slave stations connected to the station form a bus structure;

[0043] The master station includes a scanning module for scanning and obtaining slave station information, an operation module for configuring the slave station and monitoring the real-time status of the bus structure, and a timing module for implementing timing interrupt operations;

[0044] The core process of the present invention is as follows: firstly, the...

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Abstract

The invention discloses an Ethernet communication master station implementation method, comprising an Ethernet, a master station and a slave station, wherein the master station is connected with the Ethernet by a connector, and forms a bus structure with the slave station which is connected with the master station by the Ethernet; the method specifically comprises the following steps: a initializing the master station and scanning the bus, b configuring the bus and synchronously monitoring the real-time state of the bus, and c entering to the normal running stage by the bus so as to finish data communication work between the master station and the slave station. The method has beneficial effects that the master station can dynamically adjust the instruction sending time according to system task scheduling jitter and application program execution time jitter, so as to ensure the consistency of the rhythms of the master station and the slave station in reading and writing data, the real-time requirement of the method to the master station is not very high, and the allowed system task scheduling jitter is larger and larger along with the shortening of the execution time of the upper application program.

Description

technical field [0001] The invention relates to the technical field of Ethernet, in particular to a method for realizing an Ethernet communication master station. Background technique [0002] With the increasingly popularization of Ethernet technology, the Ethernet used in the field of industrial automation - real-time industrial Ethernet, has become an important development direction of industrial control field bus technology. The existing real-time industrial Ethernet on the market uses different implementation principles according to different real-time and cost requirements. The more common real-time Ethernet buses include Ethernet / IP, Modbus / TCP, Ethernet Powerlink, EtherCAT, Profinet, etc. compared to other buses. The EtherCAT bus adopts the scheduling method of lumped frames, which realizes microsecond-level high-real-time communication in both the data link layer and the physical layer, and can achieve a data refresh cycle of less than 100us, and each slave node de...

Claims

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Application Information

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IPC IPC(8): H04L12/40
Inventor 王政许微微张成瑞
Owner SHANGHAI SANY PRECISION MACHINERY
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