OPC-UA
Characteristics - OPC-UA
OPC (Open Platform Communications) enables access to machines, devices and other systems in a standardized way. To learn more about the standard visit the OPC-UA website.
Information Model Requirements
The following Node Types can be used to model data structures:
Variables
with a Simple Data Type.Variables
with a Custom Data Type.
Configuration - OPC-UA Client
Select OPC-UA Client as Channel Type.
Click the Configure button.
Make sure the root model node is selected to configure the OPC-UA Client
Enter an Application name
Configure the serverTcpConfiguration
Enter an Ip Adress
Enter the Port
Define an Endpoint
Set a Request timeout
Configure the defaultSubscriptionAttribute
Define a Publishing interval and select the Unit
Configure monitoringParameters
Set a Sampling interval and the Unit
Enter a Queue size
Enable Discard oldest depending on the use case
Enable Subscription Groups depending on the use case
Input the Group name
Define a Publishing interval and select the Unit
Set a Sampling interval and the Unit
Enter a Queue size
Enable Discard oldest depending on the use case
Select the complex variable node.
Enable the Node configuration
Assign OPC-UA data block variables to corresponding variables in the Information Model by selecting the variable in the tree
Assign data block
Enable the Nodes configuration checkbox
Enter the Node Id
Description of configuration properties:
Property |
Description |
Example |
|---|---|---|
IP Address |
Client IP |
|
Port |
Client port |
|
Endpoint path |
Service name at the server endpoint |
|
Publishing interval |
Interval in which Notification Messages are sent |
|
Sampling interval |
Sampling interval of monitored items |
|
Queue size |
Max number of messages stored in the publish queue |
|
Node id |
Id of the item |
|