Numerical control system communication interface, numerical control system and data receiving and sending method

Abstract

The present invention relates to an Ethernet-based digital control system communication interface, which comprises a field programmable gate array, a PHY1 and a PHY2, two network transformers and two twisted pair wire connectors, wherein the field programmable gate array is used to perform the dual PHY selective switch interconnection, data buffering and protocol processing; the PHY1 and the PHY2 respectively communicate with the field programmable gate array, which are used to convert the differential analog signals transmitted in network to be digital signals, and are in favor of the field programmable gate array to send and receive data after performing processing; the two network transformers are respectively connected with the PHY1 and the PHY2, which are used for the signal electrical Isolation, the chip protection and the realization of the network signal automatic turnover; the two twisted pair wire connectors are respectively connected with a transformer of the two network transformers, which are used to receive the analog signal. The present invention also relates to the digital control system, and a data receiving and transmitting method.

Description

technical field [0001] The invention relates to the field of numerical control systems, in particular to a communication interface of a numerical control system based on Ethernet technology, a numerical control system and a data receiving and sending method. Background technique [0002] In the CNC system, the traditional way for the controller to transmit commands to the servo driver is in the form of pulse train or analog voltage. This control method is only suitable for occasions where the processing speed and control accuracy of CNC machine tools are not too high, and it is difficult to meet the requirements of multi-channel , High-speed, high-precision processing requirements. [0003] In order to improve processing speed and processing accuracy, digital communication methods, such as field bus, are required between the internal controller of the CNC system and the servo drive. At present, most of the high-end numerical control systems in foreign countries use the fiel...

AI Technical Summary

Problems solved by technology

[0007] In order to solve the problems of slow processing speed and low control precision in the form of pulse train or analog voltage transmission between the existing controller and actuator, and the existence of field bus technology transmission commands must use special hardware, resulting in many types of protocols, poor compatibility, development and Due to the problems of high maintenance difficulty and high cost, and the problems of non-real-time, non-synchronous and uncertain data transmission in general Ethernet transmission, the present invention provides a communication interface of numerical control system based on Ethernet technology to ensure that Ethernet On the basis of high communication rate, the requirements of strong real-time and strong synchronous information transmission between the internal controller and actuator of the CNC system are realized at the same time

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