The WinCC REST API (Representational State Transfer Application Programming Interface) is a modern, flexible interface introduced to bridge the gap between traditional industrial automation (OT) and standard IT systems. It allows external applications to interact with Siemens SIMATIC WinCC using standard HTTP methods and JSON data formats. Key Components of WinCC REST Functionality
Then came the WinCC REST API — officially introduced with WinCC Professional (TIA Portal V15+ and later). At first glance, it sounds like a magic wand: “HTTP? JSON? Great, my web developer can now talk to a power plant.” wincc rest api
To begin using the WinCC REST API, the "Web Runtime" or "Connectivity Pack" usually needs to be enabled and configured within the WinCC project. Once the endpoint is active, developers can use tools like Postman to test requests. A typical GET request to retrieve a tag value involves calling a specific URL endpoint and receiving a JSON payload in return. This JSON format is lightweight and easy to parse, making it ideal for high-performance applications. Future-Proofing Your SCADA System TIA Portal V17 or higher (with WinCC Professional license)
If you try to treat WinCC REST API like a standard web service, you’ll hit walls. To begin using the WinCC REST API, the
The WinCC REST API is a transformative interface for modern industrial automation, allowing external applications to securely interact with SCADA data using standard web technologies. Traditionally, accessing Siemens WinCC data required complex proprietary drivers or OLE DB connections; however, the introduction of the REST interface in WinCC V7.5 SP2 and WinCC V8.0 has simplified this process by utilizing universal HTTP methods and JSON data structures. Core Capabilities of the WinCC REST Interface
