Product specifications

Aspect Groups Appendix A Object Types
522 3BDS011222-510 B
When an object type is created it automatically gets an Object Type Definition
aspect. This aspect defines the behavior of the object type. Its Configuration View
has a number of tabs, and they are described in detail in Configuration Dialogs on
page 526.
To create an instance of an object type you use the New Object dialog, where you
can browse among the object types defined in the Object Type Structure.
An object type also acts as an aspect category. When an instance is created from an
object type, one aspect (the Object Type Reference aspect) is created from this
aspect category. This implies that all aspects on the object type, which are specified
as being ‘inheritable’, are automatically available on any instance of that object
type. The inheritable setting can be controlled from the Aspect Control tab (see
Aspect Control Tab on page 529).
The Object Type Definition aspect can specify that aspects of certain aspect
categories shall be created when object instances are created. Such aspect rules can
be set up using the Category Control tab (see Category Control Tab on page 530).
These aspects will be created from scratch. If a type-specific initial state is wanted,
aspects can be copied from the type instead and this is specified below the Aspect
Control tab.
Only objects of the Object Type Group, Object Type, or Aspect Group object types
(or subtypes of them) may be part of the Object Type Structure, and it is only
allowed to place them in one object type group. Extra insertions into other object
type groups are not allowed.
However, it is allowed to insert object type groups, object types, and aspect groups
into other structures.
Aspect Groups
An Aspect Group object hold groups of aspects intended to be shared between
multiple objects or object types. An aspect group is always created in the Object
Type Structure, and is then assigned the aspects it should hold.
For example, an aspect group called ‘Master Motor Control’ may be created which
holds a documentation aspect and a faceplate aspect. An aspect of that category can
then be created on different types of (compatible) motor devices.