Siemens SIMATIC PCS 7 Function Manual page 88

OpenPCS 7 interface
6.7 OLE DB
Selecting an absolute time period
Read from start time <TimeBegin> to end time <TimeEnd>.
Example 1:
Reads the values of ValueID 1 from start time 9:03 a.m. to end time 9:10 a.m.
"TAG:R,1,'2004-07-09 09:03:00.000','2004-07-09 09:10:00.000'"
Selecting a relative time period
Reading from the start of the recording:
<TimeBegin> = '0000-00-00 00:00:00.000'
Reading to the end of the recording:
<TimeEnd> = '0000-00-00 00:00:00.000'
However, <TimeBegin> and <TimeEnd> may not both be "ZERO" = '0000-00-0000:00:00.000' .
Note
If you want to query a relative period from a connected archive database, enter this in the
following format:
0000-00-DD hh:mm:ss.msc
If you specify a period in months, the content may be incorrect since a month can have
between 28 and 31 days.
Example 2:
Reads starting from the absolute time of "TimeBegin" to the end of the recording, in other
words, to the last archived value.
<TimeBegin> = '2003-02-02 12:00:00.000',
<TimeEnd> = '0000-00-0000:00:00.000'
Example 3:
Reads 10 seconds further starting from the absolute time of "TimeBegin" .
<TimeBegin> = '2003-02-02 12:00:00.000',
<TimeEnd> = '0000-00-00 00:00:10.000'
Example 4:
Reads 10 seconds back starting from the absolute time of "TimeEnd".
<TimeBegin> = '0000-00-00 00:00:10.000',
<TimeEnd> = '2003-02-02 12:00:00.000'
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Function Manual, 05/2012, A5E02780178-02
OpenPCS 7