/WinCC/REST/Alarms/AlarmID/Acknowledge
Applications can query current values from HMI tags or update them in real-time using standard GET and POST requests. wincc rest api
: Establish a secure connection using HTTP/JSON, often prioritized with encryption or VPNs. | | Write tags | Write single or multiple tags (e
| Feature | Description | |---------|-------------| | | Read real-time values of PLC tags, internal tags, or user-defined variables. | | Write tags | Write single or multiple tags (e.g., setpoints, commands). | | Browse tags | Retrieve the tag structure (tag names, data types, groups). | | Read/write data blocks | Access structured PLC data (DBs) in WinCC Unified. | | Alarm & event retrieval | Get current and archived alarms/messages. | | User authentication | WinCC user management (login/logout, check permissions). | | Audit trail (if enabled) | Log changes made via REST API. | | | Alarm & event retrieval | Get
To change a value, you would switch to a POST request with a JSON payload.