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Transfer time difference-based numerical control system on-site bus time synchronization method and device

A technology of numerical control system and field bus, applied in the direction of synchronization device, transmission system, digital transmission system, etc., can solve the problems of increasing the difficulty of realizing periodic real-time data transmission, complexity of implementation, and occupation of network resources, etc. Simple implementation and simple field wiring

Active Publication Date: 2011-01-26
中国科学院沈阳计算技术研究所有限公司
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Problems solved by technology

This method has a wide range of applications, but its implementation is complex and takes up more network resources, which increases the difficulty of realizing short-term periodic real-time data transmission

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  • Transfer time difference-based numerical control system on-site bus time synchronization method and device
  • Transfer time difference-based numerical control system on-site bus time synchronization method and device
  • Transfer time difference-based numerical control system on-site bus time synchronization method and device

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Embodiment Construction

[0056] The field bus of the numerical control system aimed at by the time synchronization method of the numerical control system field bus based on the transfer time difference is an asynchronous serial communication bus with a linear topological connection or a ring topological connection structure. In the specified bus, both the master station and the slave station have two complete communication interfaces: the first port (port A) and the second port (port B). The bus connection topology includes two structures: linear topology and ring topology. topology such as figure 2 , 3 , as shown in 4, figure 2 The numerical control system field bus linear topology structure diagram (single linear connection topology structure) connected to the first port (port A) of the main station; image 3 The numerical control system field bus linear topology structure diagram (single linear connection topology structure) connected to the second port (port B) of the main station; Figure 4 ...

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Abstract

The invention relates to a transfer time difference-based numerical control system on-site bus time synchronization method and a transfer time difference-based numerical control system on-site bus time synchronization device. The method comprises the following steps of: setting a counter in a master station or slave stations of a topological structure respectively to calculate communication time delay between the master station and each slave station; and performing counting by using the counter to make each slave station realize execution time synchronization of each slave station according to the communication time delay between the master station and the slave station. The device consists of a start-stop signal multi-route selection and distribution controller and a communication time delay calculation module, wherein the start-stop signal multi-route selection and distribution controller receives a transmitting starting signal, a receiving starting signal and a bus topological indication signal output by communication ports of the master station or the slave stations; and the start-stop signal multi-route selection and distribution controller is connected with the communication time delay calculation module through the receiving starting and transmitting starting indication signals. The method and the system have the advantages of simple implementation, few occupied resources, no additional signal line and no need of arranging an independent execution time synchronization starting signal line.

Description

technical field [0001] The invention relates to the technical field of field bus, in particular to a time synchronization method and device for field bus of a numerical control system based on transfer time difference. Background technique [0002] Numerical control system field bus (hereinafter referred to as: numerical control bus) is a serial, digital, multi-point, two-way communication network used to realize real-time data communication between numerical control device (CNC), spindle unit, servo drive unit, I / O and other components (Such as figure 1 As shown), it is a key technology to realize full digital control, simplify equipment connection, and improve system control accuracy and reliability. It has design requirements and operating characteristics such as high speed, high real-time performance, high synchronization, and high reliability. [0003] The time synchronization of the field bus of the numerical control system (also called: execution time synchronization...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L7/00H04L29/06G05B19/18
Inventor 尹震宇杨东升于东刘明烈刘荫忠胡毅聂林
Owner 中国科学院沈阳计算技术研究所有限公司
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