Example Code

Overview
This example VI shows how to use event structural to trigger code to write to an OPC Item while still being able to read from it.

Description
This example VI shows how you can use events to trigger your code to write to an OPC Item while still being able to read from it. The VI has been using with the 'National Instruments.OPCDemo>> NI OPC Demo Server>>Analog Items>>Integers>>VT_I2:1.0..1000.0' item. The program will read from the value every 100ms (the event structure timeout case) but will write the value in the Numeric control when you press the 'Set Numeric Item' button

Requirements

• LabVIEW 2012 (or compatible)

Steps to Implement or Execute Code

1. Download the attached folder to your computer
2. Open the VI "OPC Client 2012 NIVerified.vi"
3. Run the program
4. Select an OPC item from the pop tree menu
5. Press the "Set Numeric Item Button" to write the value in the "Set Value Controller"

Additional Information or References
VI Snippet

 **This document has been updated to meet the current required format for the NI Code Exchange.**