User Manual Siemens Water System Pa Module P03-01 [9/42 Pages]

Siemens water system pa module p03-01

Industry Sector, IA&DT

SCE Training Curriculum Page 9 of 42 To be used only at Educational and R&D Facilities

P03-01_AdvancedLayout_R1309_en.doc

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 C-Actions are used for dynamical actions, this is done in the case of user defined objects

in a script, and not in many individual objects. This increases the performance of

visualization.

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.: Trend-Literacy, Shaker Verlag 2006.

[4] Siemens AG: Projektierungshandbuch Operator Station (V7.1), März 2009.

(Configuration Manual Operator Station)