Instantiating Data Objects and Data Attributes

Introduction

Use the Application Settings window to:

Display IEC61850 server data objects and data attributes.
Instantiate data attributes and data objects by assigning an initial value to data attributes.

Before you can use the Application Settings window, you need to first enable the IEC61850 server resident in the 140 NOP 850 00 module; then create a new server instance for the module.

Data table

Data Object Filter

NOTE:

Assigning an initial value to a data attribute instantiates both that attribute and the associated data object. An instantiated data attribute is indicated by the DAI object designation; an instantiated data object is indicated by the DOI object designation (or SDI for sub data objects).
Attributes with a value set to an empty string are not instantiated by the application. If values for all data attributes of a data object are set to an empty string, the application does not instantiate the data object.
For data attributes of the functional constraint CF, the initial value remains constant after the configuration is instantiated. For data attributes of other function constraint items, the initialized value is the default value if not included in I/O mapping; otherwise, the functional constraint item is not instantiated.
For data out flow variables, an assigned initial value takes effect only if a variable is not mapped to PLC memory. If a variable is mapped to PLC memory, its value comes from PLC memory.

Adding Data Objects and Data Attributes

The Application Settings window presents a Data Object Filter and a data table. Use the Data Object Filter to select data objects and data attributes of the IEC61850 server, then drag them onto the data table. The data table displays the data objects and data attributes you add to it in the following nested order:

LDevice → LNode → Data Object → Data Attribute

To add data objects and data attributes to the data table, follow these steps:

Step	Action
1	In the Data Object Filter, select a logical device in the LDevice list. The contents of the LNode filter presents logical nodes of the selected logical device.
2	In the LNode list, select a logical node. The contents of the FC list presents functional constraint items of for the selected logical node.
3	In the FC list, select a functional constraint item. The Data Object Filter displays the data objects and nested data attributes associated with the selected functional constraint item.
4	Do one of the following: Drag a data object or data attribute in the Data Object Filter and drop it onto the data table to add it to the list. Click the Add All button to add all of the displayed data objects and data attributes to the list.
5	(Optional) Type in a text Description for each data object added to the list.
6	Repeat steps 1...5 for each data object or data attribute you want to add to the data table.
7	Save your edits to preserve the structure of the data table you created.

Instantiating Data Attributes and Data Objects

Assigning an initial value to a data attribute instantiates both that attribute and the associated data object. To edit the initial value of a data attribute, follow these steps:

Step	Action
1	In the data table, expand the LDevice, LNode, and data object rows until the associated Data Attribute Instance items are visible.
2	In the Initial Value column, enter or select a value for the data attribute.
3	Repeat steps 1 and 2 for each data attribute you want to instantiate.
4	Save your edits.

Removing Data Attributes and Data Objects from the Data Table

To remove a data attribute from the data table, select the data attribute, then either:

Click the right mouse button and select Delete, or
Click the Delete key.

If you delete all attributes of a data object, that data object is removed from the data table.