Research On Equipment Control System Based On EtherCAT Real-Time Ethernet

With the rapid rise of the domestic label industry,the requirements for marking equipment also increased,requiring identification equipment to be fast,accurate and stable movement especially in the motion control.In order to achieve accurate and fast motion control,the controller is required to be able to issue a motion command to the motion control system fast,real-time and reliably.Industrial fieldbus has a lot of shortcomings on the communication,and Germany BECKHOFF developed the industrial real-time Ethernet with high efficiency,high speed,real-time,flexible topology,etc.,to solve the problems of many industries.EtherCAT can support up to 65535 devices,as well as the flexibility of protocol transmission and so on.It also makes the multi-axis control simple.Based on EtherCAT,this paper solves the problems such as the slow identification and the difficulty of real-time communication.The main contents of this paper are as follows:1.This paper first puts forward the background and significance of this research,analyzes several popular motion control methods and the current development of motion control,points out the problems faced by fieldbus technology in the current industrial development,and analyzes the industrial Ethernet relative to the field Bus technology,and finally introduced several industrial Ethernets that are more popular in current industry;2.Systematically introduced the EtherCAT motion control technology,and discussed from the advantages of EtherCAT protocol,EtherCAT slave station,master station hardware,EtheCAT communication mode and how to implement real-time control of EtherCAT.The advantages of these aspects provide the possibility of the fast,axis,and real-time of EtherCAT motion control technology.3.Designed and constructed the identification equipment,focusing on the movement part of the existed problems.In terms of hardware,compared and chose the program,selected the controller and the IO module,chose the CX series controller and EL1018,EL2008 I/O module,and draw a complete circuit diagram;introduced the mechanical structure of the composition in mechanical aspect,and the torque of the mechanical mechanism was analyzed by Simlink,obtained the torque of the X and Y axis modules;in the terms of software,based on the original program,according to the multi-task advantage of CX Series controller,re-prepared the program;describes how to communicate with the host computer by Profinet in communication aspect;through comparison and analysis to select the Labview-based control interface,and introduced how to communicate with Labview by ADS for remote interface data in the interface program aspect.4.Motion control is mainly achieved through the cam disk,so this paper analyzed how to design the cam disk in detail:firstly,each character are optimized and designed so that the program can run fast and stably when completed a single character;and then optimized the program,make each line of characters a cam disk and call it through the program,and the fuzzy control idea is used to optimize the motion system,and finally obtained the ideal recognition effect.