The search for installation and configuration errors in PROFIBUS DP segments is a time-consuming and complex process which may hardly be accomplished without the use of intelligent analysis tools. The COMSOFT NetTEST II and Busmonitor allow a complete PROFIBUS network check, starting with the physical measurement of the PROFIBUS line up to detailed protocol analysis. During the developmental phase, COMSOFT put great emphasis on creating an intuitive user interface, allowing the sporadic use of tools at any time and requiring no training.