Add Analog Item VI

Owning Palette: OPC UA Server VIs

Requires: OPC UA Toolkit

Adds an analog item to the address space and configures the analog item.

Example

	historical access specifies whether the analog item supports historical access and the size of the history data queue. enable specifies whether the analog item supports historical access. The default is FALSE, which specifies that the analog item does not support historical access. queue size specifies the size of the queue of history data. The default is 1000.
	OPC UA server refnum in specifies the reference data value of the OPC UA server.
	parent folder node ID specifies the ID of the parent folder. The format of the node ID is ns=<namespace index>;<identifier type>=<identifier>. If the parent folder does not exist, this VI creates a folder at the root level. A node ID contains the following components: namespace index is a base 10 number that indicates the namespace of the node ID. If namespace index is 0, the format of the node ID can be <identifier type>=<identifier>. The namespace index for a node that you created with the OPC UA Toolkit is 2. identifier type represents the type of the identifier and has the following values: Value Identifier Type i Numeric s String g GUID b Opaque identifier is a string value that represents the name of the identifier. The format of the node ID can also be ns=<namespace index>;<identifier type>=<identifier>@<index>:<index>. For example, ns=2;s=Folder.Array@1:2. This format only applies to the array data type and allows you to read a single element or a range of elements of an array. You cannot use @ in a node name. For backwards compatibility, parent folder node ID also accepts node paths as input for OPC UA servers only. You can regard the node path as the string type identifier of the node ID. For example, a node path can be Device.folder.item.
	analog item specifies configuration information about the analog item. name specifies the name of the analog item. data type specifies the data type of the analog item. 2 SByte 3 Byte 4 Int16 5 UInt16 6 Int32 7 UInt32 8 Int64 9 UInt64 10 Float 11 Double 102 Array of SByte 103 Array of Byte 104 Array of Int16 105 Array of UInt16 106 Array of Int32 107 Array of UInt32 108 Array of Int64 109 Array of UInt64 110 Array of Float 111 Array of Double 202 Matrix of SByte 203 Matrix of Byte 204 Matrix of Int16 205 Matrix of UInt16 206 Matrix of Int32 207 Matrix of UInt32 208 Matrix of Int64 209 Matrix of UInt64 210 Matrix of Float 211 Matrix of Double access level specifies the access method for the analog item. 1 read-only 2 write-only 3 read/write instrument range specifies the range of the values that the analog item returns. low specifies the low limit of the value range that the analog item returns. high specifies the high limit of the value range that the analog item returns. EU range specifies the range of the value that you can obtain in normal operation. low specifies the low limit of the value range that you can obtain in normal operation. high specifies the high limit of the value range that you can obtain in normal operation. engineering units specifies the units of the value of the analog item. The default is mutually defined. Select mutually defined to customize a unit that acquires mutual acknowledgement. The OPC UA Foundation recommends using the Codes for Units of Measurement. Refer to List of Trade Facilitation Recommendations N° 20 for details. description specifies additional information of the analog item.
	error in describes error conditions that occur before this node runs. This input provides standard error in functionality.
	OPC UA server refnum out returns the reference data value of the OPC UA server.
	item node ID returns the ID of the analog item.
	OPC UA variable node refnum out returns the reference to the variable node.
	error out contains error information. This output provides standard error out functionality.

Example

Refer to the OPC UA Demo.lvproj in the labview\examples\Data Communication\OPCUA directory for an example of using the Add Analog Item VI.