ConfigureOpcUa...Item (Activity)
Revision as of 10:58, 23 February 2015 by KNO (Talk | contribs) (moved ConfigureOPCUAVariable \(Activity\) to ConfigureOPCUAVariable (Activity))
| 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 | Boolean | In | Specifies the variable to be read from the server automatically after a connection to the server has been established. |
| Subscribe | Boolean | 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":
