Computerized numerical control alliance bus system, coupler and communication method

Abstract

The embodiment of the invention discloses a computerized numerical control alliance bus system, a coupler and a communication method. The communication method comprises the following steps of: firstly obtaining the current data frame, wherein the current data frame carries indication information used for indicating type of the current data frame; and then selecting a software processing module or a hardware processing module for carrying out processing on the current data frame according to the type indicated by the indication information, thus the coupler adopts a software hardware coprocessing method, differential processing means are adopted according to the data frames of different types in the NCUC-Bus (nonlinear computing unit cascade) standard, hardware inner core processing forwarding is adopted for the data frame with high real-time requirement, software inner core processing and forwarding is adopted for the data frame with low real-time requirement, and real-time performance of a field bus is improved to the utmost extent, therefore, correlation between quantity of slave stations and data frame loop transmission delay in an annular link is greatly weakened, and increase of the slave stations hardly can cause the increase of the data frame transmission delay.

Description

technical field [0001] The invention relates to the field of industrial control, in particular to a numerical control alliance bus system, a coupler and a communication method. Background technique [0002] Numerical Control Union of China Field Bus (NCUC-Bus) standard is the abbreviation of "NCUC-Bus Protocol Specification for Machine Tool Numerical Control System" issued by China Machine Tool Industry Association. [0003] NCUC-Bus coupler is a multi-port repeater based on industrial Ethernet communication above 100Mbps specially formulated for industrial automation control process including motion control. [0004] The high-end machine tool industry has high requirements for real-time and synchronization of each communication node, and the NCUC-Bus standard in my country fully reflects this requirement. In the field of high-end machine tool production, the realization of strong real-time communication and strong synchronization of high-precision clocks have always been t...

AI Technical Summary

Problems solved by technology

In the ring NCUC-Bus network, if the data frame is to be sent from the master station to the slave station n, the master station needs to go through the slave station 1, the slave station 2... the slave station n-1 to reach the slave station n, therefore, the slave station More, the longer the time it takes for the data frame to be sent from the master station to the target slave station, the greater the loop data delay, which greatly limits the real-time performance

In addition, when the NCUC-Bus coupler processes data frames from the master station to the slave station or from the slave station to the master station, its software processing module performs software exchange processing, and the software exchange itself has the problem of poor real-time performance

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