Wincc Rest Api Today

Introduction: The Shift from OPC to Web Services For decades, Siemens WinCC (Windows Control Center) has been a cornerstone of SCADA (Supervisory Control and Data Acquisition) systems. Traditionally, accessing data from WinCC meant relying on OPC (OLE for Process Control), proprietary DLLs, or complex database queries. These methods, while reliable, often required specialized engineering knowledge, specific network configurations (DCOM), and heavy client installations.

[ "dp": "MySystem.AI1", "value": 76.3, "timestamp": "2025-03-09T13:45:21Z", "dp": "MySystem.AI2", "value": 45.0, "timestamp": "2025-03-09T13:45:21Z" ] POST http://wincc-oa-server:80/set_dp Content-Type: application/json Introduction: The Shift from OPC to Web Services

maineauthor (Member)
13 years ago
Oh, goody, another one. This one doesn't yet have copies of my two KDP books, although it does have one of my older MIRA titles there. Since I discovered my two new books on the Tuebl site a week ago, I've found at least a half-dozen other sites that are also giving away my books for free. I sent Tuebl a DMCA notice, according to the format specified on their site. Yesterday, I noticed that the links were no longer working. Good, I thought. One small step for mankind. This morning, the books are back up there. The problem is that these are file-sharing sites. It's users, not the site administrators, who are pirating the books and handing them out to every Tom, Dick and Harry. So even if the sites take them down, the next day another user will just re-post them. As my husband said, trying to battle them is like trying to bail out the Titanic...with a soup can. Until somebody with real clout does something about this (like the RIAA did for music), there's no way of stopping it.
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Introduction: The Shift from OPC to Web Services For decades, Siemens WinCC (Windows Control Center) has been a cornerstone of SCADA (Supervisory Control and Data Acquisition) systems. Traditionally, accessing data from WinCC meant relying on OPC (OLE for Process Control), proprietary DLLs, or complex database queries. These methods, while reliable, often required specialized engineering knowledge, specific network configurations (DCOM), and heavy client installations.

| Feature | Description | Method Example | | :--- | :--- | :--- | | | Fetch current value of a single or multiple data points (datapoints). | GET /api/dp/$dpName | | Write Tag Value | Send a command to change a setpoint or control a valve. | PUT /api/dp/$dpName (Body: "value": 50 ) | | Get Alarm List | Retrieve active or archived alarms/events. | GET /api/alerts/active | | Acknowledge Alarm | Confirm an alarm from a remote dashboard. | POST /api/alert/$alertId/acknowledge | | Query Archive Data | Retrieve historical trends for a time range. | GET /api/history/$dpName?start=...&end=... | | User Authentication | Log in/out, check permissions. | POST /api/auth/login | | Browse Data Points | Discover the tag structure dynamically. | GET /api/dp/browse?path=System1. |

[ "dp": "MySystem.AI1", "value": 76.3, "timestamp": "2025-03-09T13:45:21Z", "dp": "MySystem.AI2", "value": 45.0, "timestamp": "2025-03-09T13:45:21Z" ] POST http://wincc-oa-server:80/set_dp Content-Type: application/json
lleelb (Member)
13 years ago
Once these sites list your book, it can then easily be found "free" via Google. Amazon doesn't "price match" the book, do they?
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