Tag logging is not happening if the value in tag is same during archiving cycle.( Even if type is cyclical continuous)

Hello shankar78,

this is known problem of inconsistency in the configuration
database of the WinCC-project.
You can not see this in the Taglogging-Editor.
In the configuration database of the WinCC-project in the
table "dbo.PDE#TAGs" there is a column "VONCHANGE".
The value in this column should be 0 for cyclic archiving,
but sometimes it is 2 (for archiving on change) although
you have configured cyclic archiving.
You can change this directly in the database, or if you would
not like to work in the database, you can go in the Taglogging-
Editor, and set for the affected tags a value > 0 for the property
Hysteresis.
Close the Taglogging-Editor, and reopen it.
The set for the affected tags the value for the property Hysteresis
back to 0.

Regards

Georg Berghof