Design Of PLC Based On LabVIEW And MCU

It is an important symbol of industrial automation that PLC is widely used. In orderto make up for the inadequacy of the domestic PLC market and overcome thedisadvantage of expensive foreign PLC this paper designs the industrial generalprogrammable controller system based on ATMEGA16MCU and LabVIEW industrialgeneral programmable controller system by integrating single-chip computer technologyand communication technology and combining with today’s hottest virtual instrumenttechnology. The system has humanized reporting features and the advantages of goodperformance and low cost at the same time upon completion of the traditional PLCfunction.This paper mainly includes overall design, hardware design and software design ofPLC. At first, this paper puts forward the ATMEGA16as the core and combinesLabVIEW technology design of PLC. Second, it integrates input/output port and designsthe analog input channel in the hardware part. The system introduces the485bus toincrease the communication distance and communication reliability of the system whendesigning the communication. Then, the software design includes two parts, that are thehardware system software design and the upper machine design. To ensure the goodrunning of the hardware system, this paper presents a1ms time node pollingprogramming idea which effectively increases the system efficiency and stability. And PCis designed by LabVIEW which achieves the serial communication by VISA nodes. PCinterface contains three parts, that are the user operating main interface, the singleequipment management and reporting interface. Through the generated report interface,users can easily generate three different forms of statements, that are Html, Word andExcel. Finally, this paper completes hardware circuit board production, carries on thesystematic test and verifies the rationality of the design method.