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 在通信模塊的設(shè)計中,我們配置了多種通信接口,使虛擬儀器具備了多種總線通信功能,具有較強的通用性;同時針對pc機與數(shù)據(jù)采集控制模塊利用rs-485總線通信時,論文中詳細介紹了數(shù)據(jù)通信模塊的軟件設(shè)計和實現(xiàn)方法。