/WinCC/REST/Tags/ReadMultiple
: Restrict the frequency of API calls from non-critical IT applications to ensure the WinCC server prioritizes core HMI graphics and PLC communication. wincc rest api
It uses standard HTTP methods: GET (read data), POST (write data), and PUT / PATCH (update data). You can read configuration data, access real-time tag
Operates as a server, allowing external systems to "pull" data. You can read configuration data, access real-time tag values, and query historical archive tags. WinCC/REST Connector (Outbound): Ensure the certificate's "Issued To" name matches the
WinCC's REST API enforces HTTPS communication, requiring a properly configured SSL certificate. Create a self-signed certificate using IIS Manager or obtain a certificate from a trusted Certificate Authority. Ensure the certificate's "Issued To" name matches the computer name exactly, as this name must be consistent throughout the configuration.
To display a live machine speed or tank level on an external web dashboard, query the tag endpoint. GET
Using a browser or Postman, navigate to: http://<Your_IP>/WinCC/REST/version If successful, you receive a JSON response like:
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