Creating a data structure¶

In atvise scada, you are able to create your own data structure in the atvise builder.

The structure of your scada server is located in the Servers ‣ My Server ‣ OBJECTS tree.

Right-click Servers ‣ My Server ‣ OBJECTS and choose Add Node… to create folders, data variables, properties and instances of your own object types:

symbol_folder Folder

Allows you to add folders to structure your object tree.

symbol_datavariable Data Variable

Allows you to add data variables to your object tree.

The following (OPC UA) data types are available :

Boolean	Boolean resp. bit (true/false).
SByte	Signed byte (builder displays decimal value). Range: -128 to 127 inclusive.
Byte	Unsigned byte (builder displays decimal value). Range: 0 to 255.
Int16	16-bit integer (signed). Range: -32,768 to 32,767.
UInt16	16-bit integer (unsigned). Range: 0 to 65,535.
Int32	32-bit integer (signed). Range: -2,147,483,648 to 2,147,483,647.
UInt32	32-bit integer (unsigned). Range: 0 to 4,294,967,295.
Int64	64-bit integer (signed). Range: -9,223,372,036,854,775,808 to 9,223,372,036,854,775,807.
UInt64	64-bit integer (unsigned). Range: 0 to 18,446,744,073,709,551,615.
Float	Defines a value that adheres to the IEEE 754 Single Precision data type definition.
Double	Defines a value that adheres to the IEEE 754 Double Precision data type definition.
String	Defines a Unicode character string that may not include control characters that are not whitespaces (0x00 - 0x08, 0x0E - 0x1F or 0x7F).
DateTime	OPC UA DateTime. Defines a Gregorian calendar date.
ByteString	Defines a value that is a sequence of byte values.
XmlElement	OPC UA XmlElement.
Variant	Defines a value without a specific data type. The value of such a variable can only be set within a server side script.
Array	Allows you to add an array of the described data types.

../../../../../_images/scada_create_datastructure.png

Adding a data variable¶

symbol_property Property

Basically, a property is the same as a data variable (for a description, see section above). The only relevant difference is that a property must always be a leaf in the object tree (so it can have no child nodes).

symbol_object Object

Allows you to add instances of your own object types to your project's data structure.

To add an object instance, choose Add Node… ‣ Object ‣ [object type].

../../../../../_images/scada_add_object.png

Adding an object instance¶

Now the "Create Object Instance(s)" window appears and you can choose from 3 possibilities of how to create instances:

Single

Creates a single object instance. You only have to key in the name of the object you want to add and then click OK.

You can directly add a "RelMirrorBase" to the object instance - go to the section Object oriented - relative mirroring for a detailed explanation.

../../../../../_images/scada_object_instances_single.png

Creating a single object instance¶

Numbered

If you want to add several consecutively numbered object instances, choose "Numbered". Here you put in an object name, a start index for your numbering and the number of object instances you want to create.

Use %1 as a wild card for your numeration.

For example: LightObject_%1 will be LightObject_001, LightObject_002, … after being added.

You can directly add a "RelMirrorBase" to the object instances - go to the section Object oriented - relative mirroring for a detailed explanation.

../../../../../_images/scada_object_instances_numbered.png

Creating several consecutively numbered object instances¶

List

If you click on list, you can import a CSV file for your object instances.

The list contains a locale name and a corresponding browse name for the data source (to add a relative mirror base to the instances - see Object oriented - relative mirroring)

Syntax for the "Source Browse Name": [namespace]:[browse name]

../../../../../_images/scada_object_instances_list.png

Creating several object instances from a CSV file¶