Name:	Medialon OPC-UA Client
Version:	6.7.2
Available for:	Manager V7 and Manager V6 & V7
Limitation In:
Device Brand:	OPC
Positrack Compatible:	No
Resources type:	None

Overview

The OPC Unified Architecture (UA), released in 2008, is a platform independent service-oriented architecture that integrates all the functionality of the individual OPC Classic specifications into one extensible framework.

This multi-layered approach accomplishes the original design specification goals of:

• Functional equivalence: all COM OPC Classic specifications are mapped to UA
• Platform independence: from an embedded micro-controller to cloud-based infrastructure
• Secure: encryption, authentication, and auditing
• Extensible: ability to add new features without affecting existing applications
• Comprehensive information modeling: for defining complex information

Device Setup

Input the address of the OPC-UA server to connect to and click the Scan button; This will connect to the chosen server and populate the root level of the node hierarchy.

Nodes tree

The server’s nodes are represented as a treeview; you can expand the nodes that allow it to navigate further down the server’s content. NOTE : depending on the server, expanding a single node can be a time-lengthy process and may result in the mxm seemingly not responding

When you hover the mouse on a node, the actual Node ID is displayed as a tooltip; This is useful for reference as it can be one of the input values for the Read/Write Symbol methods (see lower)

Adding an alias

If you double-click on a node in the treeview, it will automatically create an alias for that node; This alias can be used to refer to the node when doing method calls instead of the Node ID

Aliases

The bottom list shows the aliases created for the system; You can remove items using the “Remove” button; You can also double-click on an alias to edit it’s variable name or to subscribe to changes for that node’s value

Edit Alias

Double-click on an alias in the bottom listview of the setup screen to bring up the alias properties window

From here you can :

• change the name of the variable associated with the node
• check the subscribe option to have the variable get automatically updated when the value changes on the OPC server

Device Commands

ReadSymbol

Reads the value of an OPC-UA node.

• Symbol: [String] OPC-UA node (litteral value or using wizard selector to pick an alias)
• Value: [Any Type] target variable which will contain the item value upon command completion.

WriteSymbol

Writes a value to an OPC-UA node.

• Symbol: [String] OPC-UA node (litteral value or using wizard selector to pick an alias)
• Value: [Any Type] value to assign to he selected node.

Device Variables

Status

[Enum] Current connection status of the device.

• “Disconnected”: The device is not connected to the OPC Server
• “Connected”: The device has been successfully connected to the OPC Server

Various *****

[String] each subscribed alias gets a device variable automatically created and associated with it

Revisions

V 6.7.2

• Initial version.