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Field-bus full duplex reliable communication method for numerical control system

A technology of numerical control system and field bus, which is applied in the directions of duplex signal operation, bus network, and data exchange through path configuration. The effect of communication services

Active Publication Date: 2015-07-01
SHENYANG GOLDING NC & INTELLIGENCE TECH CO LTD
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Problems solved by technology

[0006] Aiming at the deficiencies in the prior art that the control interface of the numerical control system cannot meet the requirements of real-time communication, reliability, and communication efficiency, etc., the technical problem to be solved by the present invention is to provide a method for ensuring the correctness of data transmission in communication. , while providing full-duplex communication services to the application layer communication entities, which can meet the real-time, reliability, and communication efficiency requirements of the numerical control system field bus full-duplex reliable communication method

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  • Field-bus full duplex reliable communication method for numerical control system
  • Field-bus full duplex reliable communication method for numerical control system
  • Field-bus full duplex reliable communication method for numerical control system

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Embodiment Construction

[0035] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0036] The equipment participating in the communication in the numerical control system includes a digital controller (CNC), a servo drive, a spindle device, and an input and output device (IO). As the master device of communication, CNC will exchange data with multiple sets of servo drives, spindle devices and IO devices. The structure of CNC system based on fieldbus is as follows: figure 1 shown. The communication master station is inserted into the CNC in the form of a board, and the communication slave station is generally directly integrated on the hardware board of the servo driver or IO device. The command of CNC is sent to the specified servo drive or IO device through the field bus; the response of the servo drive or IO device is also transmitted to CNC through the field bus. During the processing, the CNC sends the interpolation position po...

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Abstract

The invention relates to a field-bus full duplex reliable communication method for a numerical control system. The method comprises the following steps: dividing data link layers of a master station and a slave station of a field-bus of the numerical control system into three parts: a sending and receiving queue, a communication scheduling state machine and a sending and receiving buffer zone; adopting a master and slave scheduling system based on time slot communication network management to divide a communication period into three stages of real-time communication, real-time resending and non-real-time communication by the communication scheduling state machine; establishing a communication frame structure having data check and frame control; and during a communication process, if a data transmission error occurs in the real-time communication stage, realizing data resending by the real-time resending stage and providing a transparent and reliable full duplex data communication service for an application layer. The invention provides a reliable, simple and high-efficient full duplex communication service for all equipment in the numerical control system. The full duplex communication service is easily realized, is convenient to update and is low in cost.

Description

technical field [0001] The invention relates to the communication technology of computer digital control, in particular to a full-duplex reliable communication method of field bus of numerical control system. Background technique [0002] The current high-speed development of equipment manufacturing technology requires that the controller in the numerical control system must meet the requirements of high speed, high precision and high efficiency, flexible processing, process compounding and multi-axis, and real-time intelligent control. The CNC system itself is also developing in the direction of openness, intelligence, platform and networking. Therefore, the control interface (analog type, pulse type) of the traditional numerical control system can no longer meet the needs of high speed, high precision, multi-channel, and compounding. According to the development trend of international numerical control system technology, the control interface of the next generation numeri...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L5/14H04L1/18H04L12/40
Inventor 王志成陈猛何平孙宇王广宇刘洋
Owner SHENYANG GOLDING NC & INTELLIGENCE TECH CO LTD
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