| Use Case | Compatible SQL Version | Provided by Siemens | Notes | | :--- | :--- | :--- | :--- | | | SQL Server 2017 Express Edition SP2 | Included in WinCC setup | Free, limited to 10GB database size | | Server/Multi-client (> 2048 tags) | SQL Server 2017 Standard (64-bit) | User must purchase separately | Requires specific collation (Latin1_General_CI_AS) | | High Availability / Cluster | SQL Server 2017 Enterprise | User purchase | Supports failover clustering | | Redundant Servers | SQL Server 2017 Standard | User purchase | Mirroring or Always On (with restrictions) |
WinCC uses Microsoft SQL Server for process value archiving, alarm logging, and user administration. WinCC 7.5 SP2 still relies on a dedicated MS SQL instance (not the TIA Portal integrated one). wincc 7.5 sp2 compatibility list
Search for “WinCC 7.5 SP2 Readme – Compatibility” on the Siemens Industry Online Support site (entry ID: 109783841). | Use Case | Compatible SQL Version |
Disable automatic updates on production servers to prevent unplanned restarts. Disable automatic updates on production servers to prevent
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WinCC is not a standalone application; it sits at the intersection of industrial automation (PLC communication) and IT (databases, reporting). Siemens rigorously tests specific combinations of: