Industry Sector, IA&DT
USER DEFINED OBJECTS
A user defined object (UDO for short) is an object that can be dynamical and consists of individual objects. At OS Engineering, we identify the properties that can be changed and select them for the user defined object. Thus, only the most important properties of all individual objects are visible and provide a good overview of the properties. In addition, it is possible to specify some properties as unalterable for all instances, and combining each individual object for each instance is dispensed with also.
On the other hand, there is the increased effort for the careful selection of the properties; however, it amortizes quickly through multiple use. User defined objects that are to be used multiple times are stored in the library.
Also, alterability is facilitated since, for example, a block name or a CFC name has to be changed only at the user defined object and not at all individual objects.
The individual instances can be changed or supplemented with additional objects any time. If
LITERATURE
[1]VDI/VDE 3699 Blatt 3: Prozessführung mit Bildschirmen – Fließbilder, Nov 1999. (Process Control with Screens – Flow Diagrams)
[2]VDI/VDE 3699 Blatt 4: Prozessführung mit Bildschirmen – Kurven, Aug 1997.
[3]Kindsmüller, M. C.:
[4]Siemens AG: Projektierungshandbuch Operator Station (V7.1), März 2009. (Configuration Manual Operator Station)
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