Method for monitoring functional components in tree structures

摘要

Method for monitoring the tree structure of a control program that comprises a number of levels each with at least one function component (FKT). A function component has input, output and test strips for storing event elements. If a first function component (FKT X.1.1.1) carries out a task successfully an event element is set in the output strip (A2). A higher level component (FKT X.1.1) input (E1) takes the event element valve from the output of the lower level strip and compares it with corresponding values in its test strip (P1). A positive comparison results in setting of the event element in its output strip (A1).