While data in ibaHD-Server is always saved with the UTC time, the display differs when changing from summer to winter time or winter to summer time, depending on whether you display the signal trends in ibaPDA or ibaAnalyzer.
Display in ibaPDA
The trend in ibaPDA shows a continuous trend, whereby the time stamp is based on the last time displayed.
Change from winter to summer time (ibaPDA)
The image figure shows the trend for the signal shortly before the time change at 01:59:
After the change to summer time, i.e. one minute later, the timeline adjusts to the new time and continues the trend retroactively so that there is no gap. The signal trend that was displayed between 1:00 a.m. and 2:00 a.m. on winter time now corresponds to the time period from 2:00 a.m. to 3:00 a.m. on summer time:
Display in ibaAnalyzer
The trend display in ibaAnalyzer shows a continuous trend, whereby the time stamp is based on the time queried. Start and end times are converted to UTC time.
Change from winter to summer time (ibaAnalyzer)
The following figure shows the period from 01:00 to 04:00 before the time change:
No data is displayed for the period from 03:00 to 04:00.
After the change to summer time, the query shows the following trend for the period 02:00 to 05:00:
No data is displayed for the period from 02:00 to 03:00.