Historical timestamp trend

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Historical timestamp trend

Post by Indrani125 »

I am working on MQTT Client driver available in WinCC OA 3.16. I am trying to push values, status and timestamp using JSON Profiles.
Is it possible to archive values with older timestamps using MQTT Protocol?
The format is shown as under:

I tested with past values but the same was not reflected in the archives.

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Re: Historical timestamp trend

Post by leoknipp »

Do you want to write historical values into the WinCC OA database?
If you want to write for a dp element a value which is older than the current timestamp of the original value you have to write a correction value using dpSetTimed() and the attribute _corr.._value.

Best Regards
Leopold Knipp
Senior Support Specialist

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