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.

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 Snap configuration. You can select only one attribute at a time using the icon. Type into the field if it supports a comma-separated list of values.
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`