When a PROFIBUS system that has been working suddenly fails, it can result in expensive production losses as well as tremendous pressure on the personnel responsible for the system. At times like these, it is important to be able to quickly locate the fault, ascertain its severity and correct it.
Too often, in the events following a system stop, untrained personnel make sporadic network changes in the hope that the system will right itself. Usually this approach results in more damage as the network termination switches are typically randomly set and devices are changed without checking that they are the source of the problem. As a result, a post event audit can never ascertain what went wrong, or whether a similar fault can be prevented in future.