Abstract: Taking the OMRON programmable controller as an example, this paper introduces the method and specific implementation of communication between LabVIEW and PLC. Keywords: PLC, LabVIEW, serial communication 1. Introduction LabVIEW is short for LabVIEW Virtual Instruments Engineering Workbench, a virtual instrument development platform software developed by National Instruments. It is powerful and flexible, and can be widely used in various fields such as automatic measurement systems, industrial process automation, and laboratory simulation. LabVIEW uses a graphical programming language, which is simple and intuitive, greatly saving program development time. LabVIEW also provides rich library functions and functional modules to complete various programming tasks. LabVIEW's most important function is that it provides data acquisition and analysis libraries, and can connect to bus interface hardware, VXI instruments, GPIB, and serial port instruments. Many instruments used in China provide serial communication functions. Using LabVIEW's serial communication functions, it is easy to connect to these instruments and transmit data via the serial port. For details, please click: Communication Implementation between Programmable Controller and LabVIEW