OPC UA Write

Overview

You can use this Snap to write data to specific variable nodes on a connected OPC UA server. The values can be both primitive and complex types.

Important: The target variable nodes must have write access for the operation to be successful.


View	Description	Examples of upstream and downstream Snaps
Input	This Snap has at the most one document input view. Accepts input documents containing Node ID and corresponding value to write (Nodes should be of type Variable). It supports writing various data types, including primitives, arrays, and complex types. Note: The input data for `ByteString` data type must be in Base64 format.	Mapper
Output	This Snap has at the most one document output view. The output image data is in Base64 format.	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.

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 Write Example: `Create company names list`
Node ID	String/Expression	Required. Specify the node ID to which values will be written. The input node must be of type variable. Default value: N/A Example: `ns=2;s=Machine1/SetTemperature`
Value	String/Expression	Specify the value to write to the corresponding node ID. The Snap supports multiple data types such as, Boolean, Double, Integer, JSON object, Object, Struct, String or complex structures. Default value: N/A Example: `72.5`
Batch size	Integer/Expression	Required. Specify the number of node-value pairs to process per batch. The Snap can handle multiple write requests in a batch. 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: Execute only Example: `Validate & Execute`