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Wincc Viewer Rt Download Fix -

After applying the wincc viewer rt download fix, implement these best practices:

If you cannot disable the firewall permanently, configure these inbound rules on the Target PC: wincc viewer rt download fix

| Port | Protocol | Service/Tool | |------|----------|---------------| | 102 | TCP | S7 Communication | | 135 | TCP | RPC Endpoint Mapper | | 1433 | TCP | SQL Server (WinCC DB) | | 50515–50520 | TCP | WinCC Download Service | After applying the wincc viewer rt download fix

PowerShell script to add the rule (run as Admin): If you cannot disable the firewall permanently, configure

New-NetFirewallRule -DisplayName "WinCC RT Download" -Direction Inbound -Protocol TCP -LocalPort 50515-50520 -Action Allow

This is the #1 cause of download failure.

  • On the Engineering PC, use exactly the same credentials when initiating the download.