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GETOLDVAL statIdent, fromTime= Ident_TmA, endTimeIdent_TmA, retIdent_Int, archIdent [MASK mask_txt]
GETOLDVAL statIdent, fromTime= Ident_TmA, endTimeIdent_TmA, retIdent_Int NOWAIT [MASK mask_txt]
statIdent | in | Reference to a Station type object. |
fromTimeIdent_TmA | in | Identifier of the AbsTime type - begin = time for reading from the archive. |
endTimeIdent_TmA | in | Identifier of the AbsTime type - end ti= me for reading from the archive. |
retIdent_Int | out | Return code identifier of the Int type.= |
archIdent | in | Reference to a Process type object (archive). |
NOWAIT | in | Keyword. If it is not entered, the action waits = synchronously for the termination of data reading. |
MASK | in | Keyword. |
mask_txt | in | Identifier of Text type - text string that c= onsists of a mask formed from the names of I/O tags for which the values ar= e to be read. |
fromTimeIdent_TmA
and endTimeIdent_TmA
. Return code (retIdent_Int
) gains one=
of the following values:=20
In case of the first declaration, the action waits for the termination o=
f the reading and archiving of values, if these are archived. In this case =
it is necessary to archive all I/O tags in one archive. An archive is repre=
sented by the identifier archIdent
. The second declaration onl=
y starts the backward reading of values and doesn't wait for its terminatio=
n. Return values is to be always _ERR_NO_ERROR.
If the keyword MASK and identifier mask_txt are defined,=
the action reads values only for those I/O tags that match the definition,=
which is entered in the identifier mask_txt. For example ma=
sk_txt :=3D "M.RIADENIE*".
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