Difference between revisions of "Activity:ConfigureOpcUa...Item (Activity)"
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Revision as of 07:52, 20 November 2014
| Configure OPC UA Variable | |
|---|---|
| Name | ConfigureOPCUAVariable |
| Purpose | Configure a single OPC UA variable |
| Category | UBIK OPC UA Interface |
| Returns | True if successful |
| Version | 2.4.1+ |
The ConfigureOPCUAVariable registers a single variable within an OPC UA Connection. Only registered variables can be accessed later on with AccessOPCUAVariable activities.
Contents
Arguments
| Argument | Type | Direction | Purpose | |
|---|---|---|---|---|
| BrowsePath | String | In | Specifies the browse path of the item on the server e.g. "/2:Plant1/2:Machine1/2:Unit1/2:Sensor1"). For a more detailed descriptions please refer to the OPC UA specification. | |
| AutoRead | Bool | In | Specifies the variable to be read from the server automatically after a connection to the server has been established. | |
| Subscribe | Bool | In | Specifies that the variable should automatically be entered into a subscription with the server to be updated with any changes to its value. | |
| Interval | TimeSpan | In | Specifies the publishing interval to be used for the subscription. All variables using the same publishing interval are grouped together in a subscription for each publishing interval. | |
| IndexRange | OpcUaIndexRange | In | For arrays, specifies the index range to be read or written. If left null, the entire array will be transferred. | |
| Result | Boolean | Out | True if successful, false if failed |
Usage
This activity is used to configure a single variable for later access within an OPC scope, only configured variables will be accessible.
Example
The ConfigureOPCUAVariable activity, as used in the larger example "Read value from OPC variable":
