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Ethernet field-bus master station structure and control method

A field bus and control method technology, applied in the field bus network, data exchange through path configuration, digital transmission system, etc., can solve the problems of complex development, real-time performance that cannot meet the numerical control system, etc., and achieve real-time performance improvement and clock synchronization Performance, good real-time data interaction effect

Inactive Publication Date: 2012-09-05
SHANGHAI SANY PRECISION MACHINERY
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Problems solved by technology

[0005] At present, the EtherCAT soft master station mainly runs on the Linux system platform. Although the Linux operating system also has real-time characteristics after adding the RTAI real-time patch, its real-time performance still cannot meet the requirements of the CNC system, and its development is relatively complicated.

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  • Ethernet field-bus master station structure and control method
  • Ethernet field-bus master station structure and control method
  • Ethernet field-bus master station structure and control method

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Embodiment Construction

[0051] 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.

[0052] Such as figure 1Shown, a kind of Ethernet field bus main station structure of the present invention, wherein, comprise Ethernet and master station, master station is connected with Ethernet through connecting device, and wherein connecting device can be network card, and master station includes and is used for scanning slave station state And obtain the idle scanning module of the slave station information, the operation module used to configure the slave station and detect the bus status, after the master station is connected to the Ethernet, the idle scanning module and the operation module work alternately, and the master station is connected to the master station through Ethernet The slave stations form the bus structure. The invention mainly divides the work of the Ethernet field bu...

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Abstract

The invention discloses a control method of an Ethernet field-bus master station. The control method comprises an Ethernet field-bus master station structure and comprises the following detailed steps of: step a, carrying out initialization on the master station; step b, carrying out configuration on a slave station; step c, carrying out periodic data communication between the master station and the slave station; and step d, when aperiodic data needs to be processed, creating a protocol request and calling a reading or writing function of the protocol by the master station to acquire the aperiodic data. The invention has the beneficial effects that the real-time performance is obviously improved compared with that of the traditional EtherCAT soft and master station based on a Linux system; and by synchronization of the system time of the soft master station to the slave station, the clock synchronization between the master station and the slave station is improved, so that the real-time data interaction is better finished.

Description

technical field [0001] The invention relates to a field bus (CAT) control method, in particular to an Ethernet field bus master station structure and a control method. 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. Especially in the field of numerical control systems, the pulse sequence control method has been gradually eliminated because it is easily disturbed by the external environment and has many connections and is complicated. It has been replaced by the real-time Ethernet fieldbus control method. Real-time Ethernet field bus has the advantages of fast transmission speed, large data packet capacity, long transmission distance, less susceptible to interference and simple wiring. There are many kinds of industrial Ethernet field buses currently used i...

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Application Information

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IPC IPC(8): H04L12/40H04L7/00
Inventor 许微微王政王龙文
Owner SHANGHAI SANY PRECISION MACHINERY
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