Since you already created complete
types with master data points in the previous chapter,
you can easily create further
data points using the database editor PARA.
Figure: Create the Data point T1
using the Context Menu of the Data point Type GS_LEVEL
To create
a single data point, activate
the context menu [rightMouseClick] of the data point type and
click the entry "Create
data point". Enter the name
of the new data point in the dialog box that will be displayed.
The data point will be created with OK.
CAUTION
Data point identifiers have to start with an
alphabetic character or with an underline "_". Numbers
are only allowed afterwards. WinCC OA
differentiates between upper and lower case - these names are
"case sensitive".
Create a data point
called T1 of the data point type GS_LEVEL.
Create a second data
point (T2) of the same type.
In the tree view of the module PARA you should
now see the following data points.
Figure: Data point type GS_LEVEL
with master data point as well as data point Instances T1 and
T2
NOTE
In order to create
data points at least the corresponding data
point type has to exist.
If you create data points of a data point type for which no master
data point exists, the data points only "inherit"
the structure, naming of the elements and data types.
If there is also a master data point, the data points also contain configs. Which attributes
of a config can be set individually for a data point, will be
defined by the selection of the respective PoerConfig.
In WinCC OA,
several data point elements could be created in a single operation.
For example, you can create the valves V1 to V3
of data point type GS_VALVE at once:
Select
the
entry "Create
multiple data points" in the context menu [rightMouseClick] of the data
point type GS_VALVE.
In
the following dialog, enter the data point identifier "V"
as prefix in the "Text
before number" field and enter
the number range "1" to "3". A single
numeric position (Min. number of digits = 1) is sufficient.
Leave
the possible suffix for the data point identifier blank (field
"Text
after number").
Close
the dialog with OK and confirm
the following dialog:
Figure: Creating
several data points with the automatic naming in the module PARA
As soon as the data points have been created, the
instance names V1, V2 and V3 will be shown in the tree view of
the PARA module for the data point type GS_VALVE.
NOTE
The database editor PARA is
a great tool within the scope of data point design and prototypes.
If you would, however, like to create a number of data points
(devices), you should use external data point lists. The data
points will then be imported to WinCC OA
using the ASCII Manager. For
more information on the ASCII manager, see chapter Import from ASCII file
(Mass Engineering) of this tutorial as well as the chapters
ASCII-Manager,
Basics and Mass
Configuration, Basics of the online help.
NOTE
In the PARA module you can
also delete data points individually via the context menu of the
data point type or data point. It is also possible to delete several
data points simultaneously. |