The function suppresses writing values of specified object of
Historical value type into the archive database and deletes original values.
Declaration
%ARC_Unwrite()
Parameters
None.
Description
If a value of historical value is determined by the function %ARC_Unwrite(),
the value will not be written into the archive database and possible
value with the same time will be deleted in the database.
Example
(H.Sinus > 0) ?
[H.Sinus] : [%ARC_Unwrite()]
The example above allows only writing the values which are greater than 0
into the archive database.