OPC UA Read

Overview

You can use this Snap to read data from specified nodes on a connected OPC UA server. This enables smooth integration of industrial device data into enterprise workflows for monitoring, analytics, or automation. It supports reading various OPC UA data types, such as integers, strings, booleans, arrays, and complex structures.


OPC UA Read Overview

  • Read-type Snap
  • Works in Ultra Tasks when the Batch size is set to 1.

Snap views

View Description Examples of upstream and downstream Snaps
Input This Snap has at the most one document input view. Mapper
Output This Snap has at the most one document output view. Mapper
Error

Error handling is a generic way to handle errors without losing data or failing the Snap execution. You can handle the errors that the Snap might encounter when running the pipeline by choosing one of the following options from the When errors occur list under the Views tab. The available options are:

  • Stop Pipeline Execution Stops the current pipeline execution when an error occurs.
  • Discard Error Data and Continue Ignores the error, discards that record, and continues with the remaining records.
  • Route Error Data to Error View Routes the error data to an error view without stopping the Snap execution.

Learn more about Error handling in Pipelines.

Snap settings

Legend:
  • Expression icon (): Allows using JavaScript syntax to access SnapLogic Expressions to set field values dynamically (if enabled). If disabled, you can provide a static value. Learn more.
  • SnapGPT (): Generates SnapLogic Expressions based on natural language using SnapGPT. Learn more.
  • Suggestion icon (): Populates a list of values dynamically based on your Account configuration.
  • Upload : Uploads files. Learn more.
Learn more about the icons in the Snap settings dialog.
Field / Field set Type Description
Label String

Required. Specify a unique name for the Snap. Modify this to be more appropriate, especially if more than one of the same Snaps is in the pipeline.

Default value: OPC UA Read

Example: Read company names list
Node ID String/Expression

Required. Specify the Node ID(s) to read from. The input node must be of type variable.

Default value: N/A

Example: ns=2;s=Sensor1/Temperature
Batch size Integer/Expression

Required. Specify the number of node values to read in a single batch request.

Default value: 10

Example: 50
Snap execution Dropdown list
Choose one of the three modes in which the Snap executes. Available options are:
  • Validate & Execute: Performs limited execution of the Snap and generates a data preview during pipeline validation. Subsequently, performs full execution of the Snap (unlimited records) during pipeline runtime.
  • Execute only: Performs full execution of the Snap during pipeline execution without generating preview data.
  • Disabled: Disables the Snap and all Snaps that are downstream from it.

Default value: Validate & Execute

Example: Execute only