How to Create Datapoint Types for the Standard Object Library

Standard library specific datapoint types can be created by using the Standard Object Library Setup panel - see How to Create a Standard Object Library. These datapoint types are automatically added into a WinCC OA project when using the library.

From each one of these datapoint types - a type of template, a datapoint for every real device can be derived by the user of the library. The datapoint types for standard library are created by using a specific name pattern.

The following nodes (see below) belong to the Standard of the Stdlib and are automatically added to the library datapoint type when creating a datapoint type via the Standard Object Library Setup panel. Add, however, the necessary elements to the nodes manually according to your requirements - see example figure further below.

If you do not use the Standard Object Library Setup panel, you have to create a datapoint type manually. The datapoint types for standard library must be created by using a specific name pattern and structure - see the steps below.

How to create a new datapoint type

  1. Open the WinCC OA PARA.

  2. Right click on the tree view and select the option "Create datapoint type" from the context menu.

  3. This opens the DP-Type editor, which allows the configuration of data point types.

  4. Name the datapoint type in the following manner: Library-Projectname_in_capital _letters>_<individual_devicename>, e.g. GAS_Valve. The Stdlib datapoint type name must contain the prefix „<LIBRARYNAME_IN_CAPITAL_LETTERS>_

  5. Beneath the datapoint type node, insert one or more further nodes. The following nodes belong to the Standard of the Stdlib and can be added to the library datapoint type:

Node Description
alarm

Contains all numerical alert, warning and/or error alert elements. For every included datapoint element, an alert handling config must be created (see _alert_hdl).

The alert handling config of the alarm node must be a sum alert handling that contains all alerts of this object.

On the "alerts" tab of the sum alert handling, configure all included alerts under "DP-model".
state Contains datapoint elements that save information about the current state/value of a datapoint.
command Contains all command datapoint elements for control and manipulation of object types (values and states) if the object allows this.
para This node is necessary for saving object specific information, such as informative texts, for example.
general Depending on the object, here hierarchical levels can be added that contain general information about the object. An important element of this node is the note element with the embedded internal DP-type _STDLIB_Note.
operationMode Defines the possible operating modes. The element references the internal DP-type _STDLIB_OMD.
infoArea Is used for simple (without CTRL Logic) configuration of info area icons for a datapoint type: :STDLIB_MOD
Figure 1. Example structure of a datapoint type

  1. Confirm the structure of this datapoint type by clicking on "OK".

  2. Right click on the tree view in PARA and select the option "Create master data point" from the context menu. Note that you cannot rename the datapoint type once a master datapoint has been created.

  3. Add all necessary WinCC OA datapoint configs to the data point elements, e.g. alert handling for the alarm node or periphery address configs.

  4. Create a new datapoint for the new datapoint type. You can choose the name of the datapoint since the datapoint is not included later in the library (only the datapoint type and the master datapoint).

  5. Close the WinCC OA PARA.