GETOLDVAL action
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GETOLDVAL statIdent, fromTimeIdent_TmA, endTimeIdent_TmA, retIdent_Int, archIdent [MASK mask_txt]
GETOLDVAL statIdent, fromTimeIdent_TmA, endTimeIdent_TmA, retIdent_Int NOWAIT [MASK mask_txt]
| statIdent | in | Reference to a Station type type object. |
| fromTimeIdent_TmA | in | Identifier of AbsTime type - begin time for reading from the archive. |
| endTimeIdent_TmA | in | Identifier of AbsTime type - end time for reading from the archive. |
| retIdent_Int | out | Return code identifier of Int type. |
| archIdent | in | Reference to a Process type object (archive). |
| NOWAIT | in | Key word. If it is not entered, the action waits synchronously for the termination of data reading. |
| MASK | in | Key word. |
| mask_txt | in | Identifier of Text type - text string that consists of a mask formed from the names of I/O tags for which the values are to be read. |
fromTimeIdent_TmA and endTimeIdent_TmA.
Return code (retIdent_Int) gains one of the following values:
In case of the first declaration, the action waits for the termination of
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
represented by the identifier
archIdent. The second declaration only starts the backward
reading of values and doesn't wait for its termination. Return values is to
be always _ERR_NO_ERROR.
If the key word 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 mask_txt := "M.RIADENIE*".
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