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What does the "-305" exactly mean at OPC if debug-log?

Question asked by JánosPetró on Jul 4, 2017
Latest reply on Jul 17, 2017 by gmichaud-verreault

Hi All, specially PI-OPC-DA-IF specialists,

 

A fragment of an OPC DA IF debug-log:

 

2017.07.04. 6:46:49,08601, 5, Debug, Sending prev data to PI for tag OPC_test_tag

   last value to PI    : 2017-07-03 12:17:20.785001 UTC | 0

   last value from OPC : 2017-07-03 12:17:22.85000  UTC | 0 | -305

   new value           : 2017-07-04 04:46:45.255001 UTC | 5.6 | -305, opcint, 10, OPCpi, OPCT | 1 | 0, 5404, UNIINT, , opcif, , , ,

2017.07.04. 6:46:49,07101, 5, Debug, Tag OPC_test_tag, received data = 5,6, at 2017-07-04 04:46:44.255001 UTC with quality = Good(192), opcint, 10, OPCpi, OPCT | 1 | 0, 5404, UNIINT, , opcif, , , ,

2017.07.04. 6:46:19,05602, 5, Debug, Tag OPC_test_tag, received data = 0, at 2017-07-03 12:17:21.85000  UTC with quality = Good(192), opcint, 10, OPCpi, OPCT | 1 | 0, 5404, UNIINT, , opcif, , , ,

 

The 'OPC_test_tag' is a polled OPC item. The series of PI archived values are based on these values, BUT the proper would be if we had a 0 at 2017-07-04 04:46:45.255001 UTC minus 1 sec!!

Is there any interface option to achieve this?? (With polled tags, using opc server's timestamps?)

 

Regards,

Janos

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