# Data quality 65728. What's it means?

**URL:** <https://forum.inductiveautomation.com/t/data-quality-65728-whats-it-means/100947>\
**Category:** Ignition\
**Created:** [January 15, 2025, 8:55pm UTC](https://forum.inductiveautomation.com/t/data-quality-65728-whats-it-means/100947 "2025-01-15T20:55:33Z")\
**Posts on this page:** 8\
**Page:** 1

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**Author:** ![idc](https://avatars.discourse-cdn.com/v4/letter/i/43a26b/32.png) [@idc](https://forum.inductiveautomation.com/u/idc)\
**Post date:** [January 15, 2025, 8:55pm UTC](https://forum.inductiveautomation.com/t/data-quality-65728-whats-it-means/100947/1 "2025-01-15T20:55:33Z")

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I am getting a lot of data quality value of 65728. Is this good? What's it means?

Thanks.

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**Author:** ![Kevin.Herron](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/kevin.herron/32/7259_2.png) [@Kevin.Herron](https://forum.inductiveautomation.com/u/Kevin.Herron)\
**Post date:** [January 15, 2025, 8:58pm UTC](https://forum.inductiveautomation.com/t/data-quality-65728-whats-it-means/100947/2 "2025-01-15T20:58:28Z")

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This is the `Good_Backfill` data quality. It means you have backfilled data coming in from something. What kind of tags are you seeing this on?

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**Author:** ![idc](https://avatars.discourse-cdn.com/v4/letter/i/43a26b/32.png) [@idc](https://forum.inductiveautomation.com/u/idc)\
**Post date:** [January 15, 2025, 9:02pm UTC](https://forum.inductiveautomation.com/t/data-quality-65728-whats-it-means/100947/3 "2025-01-15T21:02:45Z")

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This is from Kepware via OPC-UA with playback function enabled.

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**Author:** ![Kevin.Herron](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/kevin.herron/32/7259_2.png) [@Kevin.Herron](https://forum.inductiveautomation.com/u/Kevin.Herron)\
**Post date:** [January 15, 2025, 9:07pm UTC](https://forum.inductiveautomation.com/t/data-quality-65728-whats-it-means/100947/4 "2025-01-15T21:07:14Z")

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So yeah, you probably have back-fill enabled on the tag provider these tags are in, and when values arrive with timestamps earlier than the current timestamp the backfill quality is applied.

Sounds like everything is working as intended.

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<div class="post-metadata">

**Author:** ![idc](https://avatars.discourse-cdn.com/v4/letter/i/43a26b/32.png) [@idc](https://forum.inductiveautomation.com/u/idc)\
**Post date:** [January 15, 2025, 9:26pm UTC](https://forum.inductiveautomation.com/t/data-quality-65728-whats-it-means/100947/5 "2025-01-15T21:26:15Z")

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That make total sense.

Thanks.

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**Author:** ![Transistor](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/transistor/32/3380_2.png) [@Transistor](https://forum.inductiveautomation.com/u/Transistor)\
**Post date:** [January 15, 2025, 9:36pm UTC](https://forum.inductiveautomation.com/t/data-quality-65728-whats-it-means/100947/6 "2025-01-15T21:36:15Z")

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> [@idc](#):
>
> That make total sense.

Don't forget to hit the **Solution** button to mark your question as solved.

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<div class="post-metadata">

**Author:** ![idc](https://avatars.discourse-cdn.com/v4/letter/i/43a26b/32.png) [@idc](https://forum.inductiveautomation.com/u/idc)\
**Post date:** [January 15, 2025, 9:40pm UTC](https://forum.inductiveautomation.com/t/data-quality-65728-whats-it-means/100947/7 "2025-01-15T21:40:41Z")

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Looking at this page, it tells me "good\_backfill" code is 203.

[Quality Codes and Overlays | Ignition User Manual](https://docs.inductiveautomation.com/docs/8.1/platform/tags/quality-codes-and-overlays)

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<div class="post-metadata">

**Author:** ![Kevin.Herron](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/kevin.herron/32/7259_2.png) [@Kevin.Herron](https://forum.inductiveautomation.com/u/Kevin.Herron)\
**Post date:** [January 15, 2025, 9:43pm UTC](https://forum.inductiveautomation.com/t/data-quality-65728-whats-it-means/100947/8 "2025-01-15T21:43:46Z")

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Yeah, but it's also 65728 in the older data quality stuff. I don't know why one or the other is being used in this case, but it's defined as:

```python
    //This is a special type of value- we use a flag in the upper two bytes to indicate that it's a special
    //version of good. This makes it backwards compatible with old versions of Ignition that simply ignore the
    //highest 2 bytes.
    GOOD_BACKFILL(192 | 0x010000, 0, Good_Backfill);

```

`192 | 0x010000 = 65728`