# How to disable Uncertain\_EngineeringUnitsExceeded tag quality **URL:** \ **Category:** Ignition\ **Tags:** perspective\ **Created:** [April 30, 2026, 6:24am UTC](https://forum.inductiveautomation.com/t/how-to-disable-uncertain-engineeringunitsexceeded-tag-quality/115319 "2026-04-30T06:24:02Z")\ **Posts on this page:** 13\ **Page:** 1
**Author:** ![Eric\_White](https://avatars.discourse-cdn.com/v4/letter/e/85e7bf/32.png) [@Eric\_White](https://forum.inductiveautomation.com/u/Eric_White)\ **Post date:** [April 30, 2026, 6:24am UTC](https://forum.inductiveautomation.com/t/how-to-disable-uncertain-engineeringunitsexceeded-tag-quality/115319/1 "2026-04-30T06:24:02Z")
Hi All, Has anyone had this issue? I have some tags where the value falls outside their EngHigh/EngLow range and they are triggering the tag quality - _"Uncertain("Uncertain\_EngineeringUnitsExceeded: The value is outside of the range of values defined for this parameter.")"_ . That makes sense, but it also annoying that it causes the unknown overlay on perspective ![image](https://us1.discourse-cdn.com/inductiveautomation/original/3X/a/0/a0949805dcb95b3c6d970908c18ccf6bcc2d296c.png). ![image](https://us1.discourse-cdn.com/inductiveautomation/original/3X/d/b/db75b46abca2e597bf6971cd98243fd717a40d83.png) I was reviewing the tag property _Engineering Limit Mode_, which is set with _No\_Clamp_. Supposedly 'Off' means the limit is ignored but how do I select 'Off'? This is version 8.1.48 ---
**Author:** ![Jasmine\_Quick](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/jasmine_quick/32/80380_2.png) [@Jasmine\_Quick](https://forum.inductiveautomation.com/u/Jasmine_Quick)\ **Post date:** [April 30, 2026, 6:49am UTC](https://forum.inductiveautomation.com/t/how-to-disable-uncertain-engineeringunitsexceeded-tag-quality/115319/2 "2026-04-30T06:49:20Z")
If you don't need the clamp, remove the values from clampHigh and clampLow? ---
**Author:** ![danielps1818](https://avatars.discourse-cdn.com/v4/letter/d/ecae2f/32.png) [@danielps1818](https://forum.inductiveautomation.com/u/danielps1818)\ **Post date:** [April 30, 2026, 9:08am UTC](https://forum.inductiveautomation.com/t/how-to-disable-uncertain-engineeringunitsexceeded-tag-quality/115319/3 "2026-04-30T09:08:28Z")
Right click the tag, select "Edit (raw)", right click "engLimitMode", click "Delete". This makes the propery dissapear and make it fall to the default value set to Ignition. ![{0DF849D3-F208-4CCF-9106-05C1317D67E5}](https://us1.discourse-cdn.com/inductiveautomation/original/3X/9/d/9d6e5272697cb15ad57d08e0634be3dc6d3a52c6.png) ---
**Author:** ![Eric\_White](https://avatars.discourse-cdn.com/v4/letter/e/85e7bf/32.png) [@Eric\_White](https://forum.inductiveautomation.com/u/Eric_White)\ **Post date:** [April 30, 2026, 11:52pm UTC](https://forum.inductiveautomation.com/t/how-to-disable-uncertain-engineeringunitsexceeded-tag-quality/115319/4 "2026-04-30T23:52:38Z")
The tags are not being clamped, its just causing uncertain tag quality when its outside the Engineering Low/High Limit range. ---
**Author:** ![Eric\_White](https://avatars.discourse-cdn.com/v4/letter/e/85e7bf/32.png) [@Eric\_White](https://forum.inductiveautomation.com/u/Eric_White)\ **Post date:** [April 30, 2026, 11:55pm UTC](https://forum.inductiveautomation.com/t/how-to-disable-uncertain-engineeringunitsexceeded-tag-quality/115319/5 "2026-04-30T23:55:13Z")
When doing the "Edit (raw)", engLimitMode is already missing. (from my UDT definition and UDT instance). 😭 ---
**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:** [May 1, 2026, 12:02am UTC](https://forum.inductiveautomation.com/t/how-to-disable-uncertain-engineeringunitsexceeded-tag-quality/115319/6 "2026-05-01T00:02:41Z")
> [@Eric\_White](#): > > Uncertain\_EngineeringUnitsExceeded Do you have engineering limits defined on the Ignition tag? Is this an OPC tag from a third party OPC UA server? ---
**Author:** ![Eric\_White](https://avatars.discourse-cdn.com/v4/letter/e/85e7bf/32.png) [@Eric\_White](https://forum.inductiveautomation.com/u/Eric_White)\ **Post date:** [May 1, 2026, 12:03am UTC](https://forum.inductiveautomation.com/t/how-to-disable-uncertain-engineeringunitsexceeded-tag-quality/115319/7 "2026-05-01T00:03:35Z")
Yea, thats correct. ---
**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:** [May 1, 2026, 12:03am UTC](https://forum.inductiveautomation.com/t/how-to-disable-uncertain-engineeringunitsexceeded-tag-quality/115319/8 "2026-05-01T00:03:42Z")
What's correct? ---
**Author:** ![Eric\_White](https://avatars.discourse-cdn.com/v4/letter/e/85e7bf/32.png) [@Eric\_White](https://forum.inductiveautomation.com/u/Eric_White)\ **Post date:** [May 1, 2026, 12:04am UTC](https://forum.inductiveautomation.com/t/how-to-disable-uncertain-engineeringunitsexceeded-tag-quality/115319/9 "2026-05-01T00:04:42Z")
> [@Kevin.Herron](#): > > Do you have engineering limits defined on the Ignition tag? Is this an OPC tag from a third party OPC UA server? Yes, to both of those. ---
**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:** [May 1, 2026, 12:06am UTC](https://forum.inductiveautomation.com/t/how-to-disable-uncertain-engineeringunitsexceeded-tag-quality/115319/10 "2026-05-01T00:06:18Z")
Ok, I think the advice you got here won't help you. As far as I can see, the only place Ignition uses `QualityCode.Uncertain_EngineeringUnitsExceeded` is as the target mapping for OPC UA StatusCode `Uncertain_EngineeringUnitsExceeded`. This means it's the OPC UA server you are receiving this value from that is sending `Uncertain_EngineeringUnitsExceeded` along with it. Nothing you can do on the Ignition side to change or ignore that. You could maybe make an expression tag that ignores the quality or something like that, though. ---
**Author:** ![Eric\_White](https://avatars.discourse-cdn.com/v4/letter/e/85e7bf/32.png) [@Eric\_White](https://forum.inductiveautomation.com/u/Eric_White)\ **Post date:** [May 1, 2026, 12:12am UTC](https://forum.inductiveautomation.com/t/how-to-disable-uncertain-engineeringunitsexceeded-tag-quality/115319/11 "2026-05-01T00:12:03Z")
hmmm, yea I was naturally assuming its coming from Ignition, because thats were I defined some limits. But yea, absolutely could be some on the OPC server also, so I'll dig into that. Thanks Kevin 😀 ---
**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:** [May 1, 2026, 12:15am UTC](https://forum.inductiveautomation.com/t/how-to-disable-uncertain-engineeringunitsexceeded-tag-quality/115319/12 "2026-05-01T00:15:29Z")
If you configure limits and clamping on the Ignition side I'm pretty sure you end up with `Bad_OutOfRange` instead. ---
**Author:** ![Eric\_White](https://avatars.discourse-cdn.com/v4/letter/e/85e7bf/32.png) [@Eric\_White](https://forum.inductiveautomation.com/u/Eric_White)\ **Post date:** [May 1, 2026, 12:25am UTC](https://forum.inductiveautomation.com/t/how-to-disable-uncertain-engineeringunitsexceeded-tag-quality/115319/13 "2026-05-01T00:25:45Z")
Yep your correct. Using Ignition's OPC Quick Client, I can see the same _Uncertain\_EngineeringUnitsExceededquality_ is being passed from the OPC Server. Hopefully we can correct the OPC server. Otherwise, will mask it in Ignition. Thanks again Kevin