OPC UA Client Points

• Double click Points.
• Right-click Points; select New on the Popup menu.
• Click File>New>Object on the Workbench menu bar.
• Click the New Object button on the Workbench toolbar.
• Press Ctrl+N on the keyboard.

A New Point dialog box opens when you use any method.

Option	Description
Point ID	Unique name that identifies the point.
	Maximum Length
Type	Do the following.
	Check
	Select
Class	Selection depends on the point requirements. Options are: Analog Boolean Text

Review the Points section in the CIMPLICITY documentation for details about creating points.

OPC UA Client: Point Device Properties

An OPC UA Client point requires the following entries in the Point Properties dialog box>Device tab.

A	Device ID
B	Addressing
C	Scan Rate

A

Device ID

Enter the name of a configured OPC UA Client device.

Buttons to the right of the Device ID field enable you to do the following.

Button	Name
	Point Browser
	Popup Menu

B	Addressing

Addressing for an OPC UA Client point requires the following.

• Subscription/Update Criteria
• Node ID
• OPC Address Space Properties

Subscription/Update Criteria

Select a subscription that was created and/or configured in the selected OPC UA Client’s Device dialog box> OPC UA DA Configuration tab>Subscriptions tab.

The subscriptions that are available in the dropdown list correspond to the Update criteria selection.

Default subscriptions are:

DEFAULTUNSO DEFAULTPOLL

Custom descriptions display with related update criteria based on whether IsUnsolicited is True or False on the Device dialog box>OPC UA DA Configuration>Subscriptions tab.

IMPORTANT:

OPC UA servers running on devices such as PLCs may not support the Unsolicited update criteria.   If this is the case, the points will not update in the PCP, even though it is possible to browse the server from the Device configuration dialog and the Test button reports success.   Changing the update criteria to On Demand Poll Once or On Demand On Scan should allow data collection to start. Note that these update criteria are less efficient and should only be used when there are a small number of points.

Node ID

The node ID comes from the OPC UA Server.

Do either of the following.

• Manually enter the node ID.
• Click the OK button after selecting a node ID in the OPC UA Address browser to have CIMPLICITY enter the node ID.

Click the Browse button to the right of the NodeId field.

An OPC UA Address Space Browser opens listing the available server nodes

Features/options include the following.

	Feature/Option	Description
1	Max References To Return	Maximum number of nodes/child nodes to be listed in the Address Space tree.
		Default
2	Address Space	Tree listing: Nodes. Objects associated with a node. Child nodes associated with an object.
3	Basic information	Read-only fields report the following for a selected node. Selected Node ID Configured Data Type Server Data Type
4	Show Browse Status	Check to display diagnostic  messages about the OPC UA Server

OPC Address Space Properties

The OPC UA Address Space browser may not list all available nodes. If you think a node should have property nodes, but they are not available do the following.