---
title: OPC-UA
slug: concepts/opc-ua
docTags: UDglSYuzCeqYsFuKMx-fS
createdAt: 2025-09-01T12:22:11.655Z
---

## What is OPC-UA?

**OPC-UA (Open Platform Communications Unified Architecture)** is a universal language for machines and software in factories and industrial environments. It helps different devices and programs from different brands communicate safely and reliably.

**In simple terms:** OPC-UA is like a universal translator that lets all your machines and software talk to each other, no matter who made them.

## Why use OPC-UA?

- **Vendor-neutral:** Works with equipment from any manufacturer.
- **Platform-independent:** Not tied to Windows, so it also runs on Linux and macOS.
- **Secure:** Built-in authentication, encryption, and message signing.
- **Scalable:** Handles small setups or thousands of devices.
- **Ideal for IIoT:** Perfect for modern, connected factories.

## More information

- [OPC-UA Reference](https://reference.opcfoundation.org/)
- [OPC-UA Status Codes](https://github.com/OPCFoundation/UA-Nodeset/blob/latest/Schema/StatusCode.csv)
- [Configuring an OPC-UA collector](docId\:cbPZ6grW35DjVuuNg86_H)