Research And Development Of Coal Mine Supervisory Control System Interface Based On Industrial Ethernet

Research of Coal Mine Supervisory Control System Interface Based on Industrial Ethernet unifies RS232 and RS485/422 bus communication to industrial internet,that is,the purpose of the research is a UART-network protocol converting interface. Because of the limitation of transmission distance and serial transmission rate we need a UART-network protocol converting interface to convert serial data to internet data in order to improve the data transmission stability. Once doing these the host machine could free itself from heavy business,and the only thing it need to do is internet communication, so it can increase data width,service for computer monitoring system better.The paper designs a UART-network protocol converting interface. It is mainly engaged in protocol conversion between UART modules and internet modules. It mainly completes the control and the conversion of data storage between UART communication and internet. It can process a variety of data, and receive UART data stream from UART devices, then convert the data format that could transmit in internet. While the data frames come from internet will be analyzed, and then sended to UART devices coverted to UART data. The paper can be devided into two parts,which are hardware design and software design. Hardware selects STC89C52AD as controller , and UART processing module uses MAX485 to convert RS485 electric for UART. Internet control chip selects W5100 Hardware parts introduce control parts, power parts, internet transmission parts, UART transmission conversion detailedly. Software parts give a introduce of UART and UART communication, and the startup code implementation of system,driver of UART, main process and part codes of TCP/IP protocol stack, and test the function of results and system at last.