Applicable Systems
WinCC
Symptoms
The SCADA system reports a web client connection timeout. The web client failed to connect within the timeout.
Possible Causes
- Network latency too high for the web client
- Web server service not responding
- Firewall blocking the web client connection
Troubleshooting Steps
- Step 1: Check the network latency to the web server
Latency is within acceptable limits - Step 2: Verify the web server service status
Service is running and responsive - Step 3: Check the firewall rules for the web client port
Port is open and accessible
How to Reset
To reset: Resolve the connection issue, then have the client reconnect.
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Source: Siemens WinCC SCADA Manual, Siemens AG
Category: SCADA
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