Wincc Rest Api -

The REST interface supports language specifications through HTTP headers. The "Content-Language" header specifies the language used in URLs or queries (e.g., message class names), while the "Accept-Language" header indicates the preferred language for returned data. Languages are specified using two-letter ISO 639-1 codes.

Enter the . Starting primarily with WinCC Open Architecture (OA) and evolving into WinCC Professional (TIA Portal) , Siemens has embraced RESTful web services. This article provides an exhaustive deep dive into what the WinCC REST API is, why it matters, how to implement it, and real-world use cases.

Which are you using (Unified, V7/V8, or Professional)?

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Reading and writing real-time tag values and configuration data. Historical Retrieval:

Python is the industry standard for data science and IT automation. Below is a clean, practical script using the requests library to poll data from a WinCC REST API instance.

To change a setpoint, an external system sends a PUT or POST request with a JSON payload. Enter the

curl -X GET https://192.168.1.100:5001/api/v1/tags/Tank_Level/value \ -H "Authorization: Bearer eyJhbGc..." \ -k

完成配置后，便可编写代码与WinCC交互。以下以C#为例，展示如何读取WinCC变量值。

| Endpoint | Method | Description | |----------|--------|-------------| | /auth/login | POST | Authenticate user, receive session token. | | /auth/logout | POST | Invalidate session. | | /tags | GET | List all tags (names, types). | | /tags/<tag_name>/value | GET | Read value of one tag. | | /tags/<tag_name>/value | PUT | Write value to one tag. | | /tags/values | POST | Read multiple tags in one request. | | /tags/values | PUT | Write multiple tags. | | /alarms/current | GET | Get active alarms. | | /alarms/archive | GET | Get historical alarms (with filters). | | /users/current | GET | Get logged-in user info. | Which are you using (Unified, V7/V8, or Professional)

: Query active alarms, historical logs, and remotely acknowledge alerts.

This approach represents a significant departure from traditional industrial communication protocols. Instead of wrestling with complex DCOM configurations or OPC DA setup procedures, developers can now interact with WinCC using familiar web technologies like HTTP, HTTPS, and JSON—the same tools used to build modern web applications and cloud services.