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Regarding CPU Time Synchronization after Power Failure

It appears your CPU is not automatically synchronizing time after a power failure, leading to data loss during shift changes after manual synchronization via PG time. This is a known issue with potential causes relating to the hardware clock and synchronization settings.

Here's a breakdown and potential solutions:

• Hardware Clock Battery: A weak battery on the CPU's hardware clock can cause it to drift significantly during power outages. Replacing the battery is often the first step.
• Time Synchronization Settings: Ensure your CPU is configured to synchronize time automatically via a network time protocol (NTP) server or using the PG time, if appropriate for your setup. Check the CPU properties in your TIA Portal project.
• Automatic Time Update: Unfortunately, there isn't a direct setting to *force* automatic time update from PG time on every restart. However, proper NTP configuration or periodic synchronization tasks can mitigate this.

Recommendation:

I strongly recommend consulting the following SiePortal FAQ for detailed troubleshooting steps and configuration guidance:

If the issue persists after checking these points, please open a support request via Siemens Support, providing your CPU model and TIA Portal version for specific assistance.