OPC UA Client Source block

The OPC UA Client Source block is used to read items from OPC UA servers into Architect fields.

NOTE:
This block makes only 1 connection to the OPC UA server.

This connector may or may not be available on the user palette, according to your license type.

This block does not have a discrete source version.

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OPC UA Client Source block

Description

The OPC UA Client Source block is an OPC UA data access client. It connects to OPC UA data access servers and reads data into Architect fields.

diagram showing the OPC UA client source block

Block Type

Input block

Output port

The values of the fields in the output port of the source block are read from the OPC UA server.

Functions performed on tags

  • On the values - The source block sets the values of the fields from the OPC UA server as determined by the configuration.

    • If Execution Mode is set to Real-time, all field values are set to the current value returned by the OPC UA server at the time of execution.

    • If Execution Mode is set to Historical:

      • If Use aggregate is set to No , all field values are set to the raw values returned by the OPC UA server for the given time period.

      • If Use aggregate is set to Yes, all field values are set to the aggregated values returned by the OPC UA Server as specified by the function selected for Aggregate.

  • On the timestamp - Individual field timestamps are either set to the field timestamp returned by the OPC UA server, or set to the blueprint execution time based on the OPC UA Client Source block configuration. The source block may be configured to round the timestamp to the nearest multiple of the execution period. Field timestamps are determined by setting Field timestamping.

    • Set to execute time - Set the field timestamp to the execute time of the blueprint.

    • Set to execute time on change - Set the field timestamp to the execute time of the blueprint when the value or quality changes.

    • Unchanged - Set individual field timestamps to the timestamps returned by the OPC UA Server for each respective value returned.

  • On the quality - The source block gets the quality of the fields from the OPC UA server

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CSense 2023- Last updated: June 24,2025