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A data transmission method and device

A data transmission method and data technology, applied in the direction of digital transmission system, transmission system, data exchange network, etc., to achieve the effect of reducing lag delay and high real-time performance

Active Publication Date: 2020-03-17
湖南戈人自动化科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, EtherCAT bus data from the master station to the slave station, each station has a certain lag delay, this delay is superimposed, which restricts the further improvement of its real-time performance

Method used

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  • A data transmission method and device
  • A data transmission method and device
  • A data transmission method and device

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Experimental program
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Embodiment Construction

[0033] The specific implementation manner of the present invention is described below by taking an embodiment as an example.

[0034] Such as figure 1 Shown is the hardware connection diagram of the access device. The access device 101, the interface conversion chip 102, the Ethernet transceiver 103, and the network transformer 104 are sequentially connected; the Ethernet transceiver plus the Ethernet network transformer 104 constitutes an Ethernet physical port; figure 2 It is the hardware connection diagram of the switch, and each port of the switch is the above-mentioned Ethernet physical port.

[0035] An embodiment of the interface conversion chip is a quasi-chip composed of an FPGA chip.

[0036] An embodiment of the main control chip of the switch is a quasi-chip composed of an FPGA chip.

[0037] The embodiment of described common port has UART, SPI, parallel port.

[0038] One embodiment of the Ethernet transceiver interface is an RMII interface.

[0039] An emb...

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PUM

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Abstract

The invention discloses a method for transmitting data and a device for achieving the method. An Ethernet physical port and an Ethernet transceiver are adopted, and a MAC controller of the Ethernet is not adopted. A data frame, with a destination address, sent by equipment is transmitted to an interface conversion chip, and the output end of the interface conversion chip serves as the Ethernet physical port; the Ethernet physical port of the interface conversion chip is connected with an exchanger Ethernet physical port, an effective data frame is extracted from data flow of the Ethernet physical port through an exchanger, and the data frame is forwarded to the corresponding Ethernet physical port according to the data frame destination address; after the interface conversion chip receives a data packet through the Ethernet physical port, the effective data frame is extracted, and the data frame is output to equipment through a serial port or a parallel port; the equipment connected into the exchanger through the interface conversion chip can achieve remote, high-rate and high-real-time communication by operating the common serial port or parallel port.

Description

technical field [0001] The invention belongs to the field of industrial control, and in particular relates to a data transmission method and device. Background technique [0002] In industrial control occasions, Ethernet technology has made great progress. Obtaining a high-speed real-time safe and reliable industrial Ethernet network is the goal of everyone's efforts. Many real-time industrial Ethernet technologies use dedicated switch technology, but real-time security is still difficult to guarantee. The reason is that Ethernet is not originally designed for industrial control, it is only suitable for the transmission of large packets of data, and the data flow in industrial control occasions is generally small. If Ethernet communication is used, even if one bit of information is transmitted, at least 64 bytes are required data frame transmission, the bandwidth utilization rate is 0.2%. Now, the more successful case is the EtherCAT bus technology, which does not use swi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L12/44
CPCH04L12/44H04L2012/445
Inventor 胡小春
Owner 湖南戈人自动化科技有限公司