| Zdroj: |
Düsseldorf : VDI Verlag, Fortschritt-Berichte VDI : Reihe 8, Mess-, Steuerungs-und Regelungstechnik 1268, 1 Online-Ressource (VII, 75 Seiten) : Illustrationen (2019). doi:10.18154/RWTH-2020-01573 = Dissertation, RWTH Aachen University, 2019 |
| Popis: |
Process plants are very complex and require a sophisticated control system. Unfortunately "competence and qualification on the user and operator side are decreasing". At any rate, 56% of around 1800 members surveyed in the German engineering association VDMA gave this result in a survey. In order for operators to be able to operate the plant even in critical situations, a powerful adapted user interface is required. However, these interfaces are very complex to create. There are two evident ways to reduce these costs. First, costs can be saved by automatically creating as many parts of the user interface as possible from existing planning data. This also has the advantage that the final result is available earlier. Furthermore, fewer errors can creep in during recurring parametrization tasks during creation, which increases overall quality. Secondly, costs can be reduced by using the user interface as long as possible. In process plants, a service life of 30 years is not unusual. The control technology and especially the visualization technology, however, use more and more standard components from the IT industry, which are subject to a faster change. Therefore, this thesis proposes a new concept for the creation, maintenance and use of user interfaces. The entire representation is stored as an HMI model. Therefore, not only for all graphic elements (text, rectangle, circle ...), but also the entire interaction with the process and the operator model elements (as meta model elements) were defined. This facilitates the automatic creation and modification of the entire representation. This meta model is defined as technology-independent for maximum future security. For very complex tasks, however, there is an additional extension to freely program via HTML and JavaScript. This extension was developed in such a way that it is strongly interlocked with the model world and between both a simple information exchange is possible. In order to display such an HMI model of a plant, a display system is required that interprets the few defined meta model elements at runtime. If required, this display system can be implemented in new technologies during the life cycle of the technical plant. As a prototype a display system with web technology was realized. This technology has the great advantage that powerful web browsers exist for all modern operating systems. This means that the prototype itself can be used platform-independently. |
