摘要:
The invention relates to a method for providing a navigation tool of a user interface for an industrial control system. The control system is arranged with a plurality of process graphics comprising one or more software objects. The software objects are arranged in hierarchical groups each representing a process, part-process or an equipment, in which materials are moved and/or processed in a predetermined order. The navigation tool includes a graphic image or map showing the plurality of process graphics symbolically arranged as a plurality of nodes. Each node is spatially arranged at a given distance from the centre of the map according to a hierarchical relationship between the process graphics, and the map is displayed superimposed on top of the process graphic currently displayed on the workstation. A computer program and a workstation are also described. The node representing the currently open process graphic is shown by a visual indicator.