The function suppresses writing values of specified object of the Historical value type into the archive database and deletes original values.
Declaration
Blok kódu
language
esl
theme
Confluence
%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
Blok kódu
language
esl
theme
RDark
(H.Sinus > 0) ?
[H.Sinus] : [%ARC_Unwrite()]
The example above allows only writing the values which are greater than 0 into the archive database.