Daylight Savings Time (DST)

AVEVA Enterprise SCADA uses Coordinated Universal Time (UTC), a neutral form which is not affected by Daylight Savings Time (DST). How these times are converted for your convenience varies by application.

For applications that include a timestamp (log files, Network Management Console (NMC), AdminPager) the timestamp is converted to the time zone that has been set for your computer. This setting can be accessed in the Microsoft Date and Time Properties panel.

Note: Within the Historical documentation, there are references to both Greenwich Mean Time (GMT) and UTC. All fields refer to data in the same time zone, the two notations are to indicate a difference in how the data is represented. GMT represents a time in older tables which are stored in seconds. UTC represents a time in newer tables which is stored as a Microsoft SQL datetime2 data type.

Custom applications developed for your system may handle the UTC to DST conversion differently; check with your Service manager if you have questions.