Wincc Rest Api Guide

The WinCC REST API is not a full replacement for OPC UA. OPC UA provides data modeling (nodes, methods, historical access), pub/sub, and proven industrial reliability. The REST API is best viewed as a supplemental convenience layer — not a core SCADA interface.

"Name": "Tank_Level", "Value": 75.4, "Quality": "Good", "Timestamp": "2025-03-15T14:32:01Z"

When a production order finishes, the MES system writes a completion timestamp directly to WinCC via REST. No need for an OPC gateway or middleware PC.

The payload is formatted strictly in JSON (JavaScript Object Notation) , making it instantly readable by modern programming languages (Python, C#, JavaScript) and enterprise software. wincc rest api

An OEM monitors 20 packaging lines across different sites. A central Node-RED server polls each WinCC instance via REST API every 10 seconds, aggregating alarms into a cloud dashboard.

The core idea is beautiful. The WinCC REST API allows external clients to:

In this article, we will explore what the WinCC REST API is, which versions support it, how to authenticate, core endpoints, real-world use cases, and security best practices. The WinCC REST API is not a full replacement for OPC UA

: Alex integrated a 3rd-party weather service into his SCADA screens. By using the WinCC REST Connector

The WinCC REST API is an OPC UA–based RESTful interface that allows external clients to interact with a running WinCC project using standard HTTP methods (GET, POST, PUT, DELETE). It exposes:

First, the application requests an authentication token by sending a POST request with encrypted credentials to the login endpoint. Once the token is acquired, it is added to the HTTP header for data requests. "Name": "Tank_Level", "Value": 75

Clients can read and write internal and external WinCC process tags. This enables external software to pull live sensor readings or push setpoints down to the PLCs via WinCC. 2. Historical Data (Trending)

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The WinCC REST API is a modern interface introduced in WinCC V8.0 WinCC Unified

Alex decided to put it to the test for a new "Smart Reporting" project. Setting the Stage : He activated the WinCC REST Service in the Computer editor, setting up a secure HTTPS port. Opening the Door : Using standard HTTP methods

To ensure a robust and secure integration, follow these essential guidelines: