Wincc Rest: Api

For API access, create dedicated WinCC users in the User Administrator. These credentials will be used for authentication in API requests.

: Set up secure certificates and define endpoints in the WinCC Certificate Manager.

Instead of using complex, proprietary industrial protocols like OPC UA or native Siemens drivers, developers can use universal web programming languages (such as Python, JavaScript, C#, or Go) to communicate with WinCC. Data is exchanged in , making it instantly readable by modern web apps, cloud services, and databases. Key Capabilities wincc rest api

Not all WinCC flavors include native REST API support. As of 2025:

: Find the tag management endpoint (e.g., /WinCCRestApi/v1/Tags ). For API access, create dedicated WinCC users in

curl -X PUT "https://192.168.1.100/api/v1/tags/Tank1_Level" \ -H "Authorization: Bearer <token>" \ -H "Content-Type: application/json" \ -d '"value": 50.0'

Unlike older DCOM or OPC DA interfaces, REST uses JSON over HTTP/HTTPS—meaning any programming language (Python, JavaScript, C#, etc.) or tool (Postman, Node-RED, Power BI) can integrate without special COM libraries or Windows-only dependencies. As of 2025: : Find the tag management endpoint (e

Certificate issues typically manifest as connection closure errors during SSL handshake. Solutions include: