during the process of communication module design, various communication interfaces are configured, which enable the virtual instrument to contain multiple bus communication functions with strong universal application . when concerning the rs-485 communication between personal computer and data acquisition control module, the author of this paper introduces at length the software design and its realizing method in data communication module 在通信模块的设计中,我们配置了多种通信接口,使虚拟仪器具备了多种总线通信功能,具有较强的通用性;同时针对pc机与数据采集控制模块利用rs-485总线通信时,论文中详细介绍了数据通信模块的软件设计和实现方法。