# AB Compact Logix OPC tags Bad\_Failure quality

**URL:** <https://forum.inductiveautomation.com/t/ab-compact-logix-opc-tags-bad-failure-quality/63086>\
**Category:** Ignition\
**Created:** [August 17, 2022, 1:56am UTC](https://forum.inductiveautomation.com/t/ab-compact-logix-opc-tags-bad-failure-quality/63086 "2022-08-17T01:56:08Z")\
**Posts on this page:** 19\
**Page:** 1

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**Author:** ![franklepkowski](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/franklepkowski/32/4808_2.png) [@franklepkowski](https://forum.inductiveautomation.com/u/franklepkowski)\
**Post date:** [August 17, 2022, 1:56am UTC](https://forum.inductiveautomation.com/t/ab-compact-logix-opc-tags-bad-failure-quality/63086/1 "2022-08-17T01:56:08Z")

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Hello,

OPC tags using the Ignition OPC UA AB driver (gateway v8.1.17) are all showing up with quality Bad\_Failure. I cannot find a reason, if I go on the gateway in the quick client I can read and write tags without issues???

Thanks,

Frank

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**Author:** ![pturmel](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/pturmel/32/3295_2.png) [@pturmel](https://forum.inductiveautomation.com/u/pturmel)\
**Post date:** [August 17, 2022, 2:19am UTC](https://forum.inductiveautomation.com/t/ab-compact-logix-opc-tags-bad-failure-quality/63086/2 "2022-08-17T02:19:30Z")

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What is the firmware version of the PLC ? If v20.19 or higher, you MUST use the modern Logix driver. If firmware v20.13 or lower, use the legacy CompactLogix driver. (If 20.14-20.18, also use the legacy driver, but expect trouble. Consider flashing the firmware.)

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**Author:** ![franklepkowski](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/franklepkowski/32/4808_2.png) [@franklepkowski](https://forum.inductiveautomation.com/u/franklepkowski)\
**Post date:** [August 17, 2022, 2:21am UTC](https://forum.inductiveautomation.com/t/ab-compact-logix-opc-tags-bad-failure-quality/63086/3 "2022-08-17T02:21:59Z")

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Hello,

I should have specified we are using the modern AB driver.

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<div class="post-metadata">

**Author:** ![pturmel](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/pturmel/32/3295_2.png) [@pturmel](https://forum.inductiveautomation.com/u/pturmel)\
**Post date:** [August 17, 2022, 2:23am UTC](https://forum.inductiveautomation.com/t/ab-compact-logix-opc-tags-bad-failure-quality/63086/4 "2022-08-17T02:23:02Z")

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With which firmware? Why did you choose the modern driver?

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<div class="post-metadata">

**Author:** ![franklepkowski](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/franklepkowski/32/4808_2.png) [@franklepkowski](https://forum.inductiveautomation.com/u/franklepkowski)\
**Post date:** [August 17, 2022, 2:24am UTC](https://forum.inductiveautomation.com/t/ab-compact-logix-opc-tags-bad-failure-quality/63086/5 "2022-08-17T02:24:21Z")

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It is version 32

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<div class="post-metadata">

**Author:** ![pturmel](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/pturmel/32/3295_2.png) [@pturmel](https://forum.inductiveautomation.com/u/pturmel)\
**Post date:** [August 17, 2022, 2:37am UTC](https://forum.inductiveautomation.com/t/ab-compact-logix-opc-tags-bad-failure-quality/63086/6 "2022-08-17T02:37:06Z")

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Ok. Have you tried to subscribe in the quick client, too, or just read and write?

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<div class="post-metadata">

**Author:** ![franklepkowski](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/franklepkowski/32/4808_2.png) [@franklepkowski](https://forum.inductiveautomation.com/u/franklepkowski)\
**Post date:** [August 17, 2022, 2:38am UTC](https://forum.inductiveautomation.com/t/ab-compact-logix-opc-tags-bad-failure-quality/63086/7 "2022-08-17T02:38:19Z")

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Will try that and post results.  
Thanks

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<div class="post-metadata">

**Author:** ![pturmel](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/pturmel/32/3295_2.png) [@pturmel](https://forum.inductiveautomation.com/u/pturmel)\
**Post date:** [August 17, 2022, 2:39am UTC](https://forum.inductiveautomation.com/t/ab-compact-logix-opc-tags-bad-failure-quality/63086/8 "2022-08-17T02:39:55Z")

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{ Bedtime for me. Californians can take it from here… }

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<div class="post-metadata">

**Author:** ![franklepkowski](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/franklepkowski/32/4808_2.png) [@franklepkowski](https://forum.inductiveautomation.com/u/franklepkowski)\
**Post date:** [August 17, 2022, 3:44am UTC](https://forum.inductiveautomation.com/t/ab-compact-logix-opc-tags-bad-failure-quality/63086/9 "2022-08-17T03:44:44Z")

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We are also getting spammed with these messages in gateway log. When we disable opc ua device they stop.

 ![image](https://us1.discourse-cdn.com/inductiveautomation/original/3X/2/0/20c5e185fd84489edd20f8a4f9dfd57e7b190118.jpeg)

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<div class="post-metadata">

**Author:** ![franklepkowski](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/franklepkowski/32/4808_2.png) [@franklepkowski](https://forum.inductiveautomation.com/u/franklepkowski)\
**Post date:** [August 17, 2022, 4:14am UTC](https://forum.inductiveautomation.com/t/ab-compact-logix-opc-tags-bad-failure-quality/63086/10 "2022-08-17T04:14:48Z")

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We can subscribe from quick client with no issues.

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<div class="post-metadata">

**Author:** ![pturmel](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/pturmel/32/3295_2.png) [@pturmel](https://forum.inductiveautomation.com/u/pturmel)\
**Post date:** [August 17, 2022, 11:09am UTC](https://forum.inductiveautomation.com/t/ab-compact-logix-opc-tags-bad-failure-quality/63086/11 "2022-08-17T11:09:13Z")

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Consider restarting the OPC Server module itself.

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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:** [August 17, 2022, 12:16pm UTC](https://forum.inductiveautomation.com/t/ab-compact-logix-opc-tags-bad-failure-quality/63086/12 "2022-08-17T12:16:15Z")

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Can we see the tag diagnostics for one of the bad tags and a screenshot of the Tag Group settings those tags belong to?

That you’re seeing those errors only when the device is enabled suggests you’re either using OPC Polled Mode, or you have periodic reads in a script set up, or transaction groups in Read Mode.

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<div class="post-metadata">

**Author:** ![franklepkowski](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/franklepkowski/32/4808_2.png) [@franklepkowski](https://forum.inductiveautomation.com/u/franklepkowski)\
**Post date:** [August 17, 2022, 1:52pm UTC](https://forum.inductiveautomation.com/t/ab-compact-logix-opc-tags-bad-failure-quality/63086/13 "2022-08-17T13:52:29Z")

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We have restarted the Ignition OPC UA Module with no change.

 ![image](https://us1.discourse-cdn.com/inductiveautomation/original/3X/3/6/3624176e6a4e9c517b947fd5766f08f6d04b522c.png)

 ![image](https://us1.discourse-cdn.com/inductiveautomation/original/3X/7/0/70b532b07bf12a594cefa49d51743d4f1e216f49.png)

We were changing tag group settings to see if they were causing the issue, but nothing changed tags remained Bad\_Failure quality.

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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:** [August 17, 2022, 1:54pm UTC](https://forum.inductiveautomation.com/t/ab-compact-logix-opc-tags-bad-failure-quality/63086/14 "2022-08-17T13:54:46Z")

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Any reason you’re using polled instead of subscribe?

I think you may need to call into support to for some real troubleshooting, but as a last ditch effort I’d try installing the latest Logix driver module from the downloads page and see if anything changes.

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<div class="post-metadata">

**Author:** ![Adamo\_Ventimiglia](https://avatars.discourse-cdn.com/v4/letter/a/4af34b/32.png) [@Adamo\_Ventimiglia](https://forum.inductiveautomation.com/u/Adamo_Ventimiglia)\
**Post date:** [September 25, 2023, 7:25pm UTC](https://forum.inductiveautomation.com/t/ab-compact-logix-opc-tags-bad-failure-quality/63086/15 "2023-09-25T19:25:53Z")

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Was this issue resolved? I'm on an AB CompactLogix PLC v32 and also have the same issue.

All tags values are "Bad\_Failure"  
The OPC Quick Client is able to read all the tags.  
When I made a new project and read the same tags, there were no issues.

I'm looking on how to solve the tag reads in my original project without success so far

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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:** [September 25, 2023, 7:36pm UTC](https://forum.inductiveautomation.com/t/ab-compact-logix-opc-tags-bad-failure-quality/63086/16 "2023-09-25T19:36:58Z")

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No, I don't think this went any where.

Are you sure you're using the Logix v21+ driver? Are there any errors in your gateway logs? What version of Ignition are you using?

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<div class="post-metadata">

**Author:** ![Adamo\_Ventimiglia](https://avatars.discourse-cdn.com/v4/letter/a/4af34b/32.png) [@Adamo\_Ventimiglia](https://forum.inductiveautomation.com/u/Adamo_Ventimiglia)\
**Post date:** [September 25, 2023, 7:56pm UTC](https://forum.inductiveautomation.com/t/ab-compact-logix-opc-tags-bad-failure-quality/63086/17 "2023-09-25T19:56:55Z")

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Ignition Version 8.1.27  
Yes, the Logix v21+ driver (Allen-Bradley Logix Driver)

 ![image](https://us1.discourse-cdn.com/inductiveautomation/original/3X/f/6/f6c01e87304d5f3a1d80d65d4b76adb168bc7e52.png)  
 ![image](https://us1.discourse-cdn.com/inductiveautomation/original/3X/3/0/30d9bc9d9c12203ff09d437668ea3a6bb00051ed.png)

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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:** [September 25, 2023, 8:00pm UTC](https://forum.inductiveautomation.com/t/ab-compact-logix-opc-tags-bad-failure-quality/63086/18 "2023-09-25T20:00:42Z")

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Hmm, this looks like some kind of bug. It may be resolved by upgrading, but otherwise you'll need to contact support so they can gather logs, wireshark captures, PLC program if possible/necessary, etc...

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<div class="post-metadata">

**Author:** ![franklepkowski](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/franklepkowski/32/4808_2.png) [@franklepkowski](https://forum.inductiveautomation.com/u/franklepkowski)\
**Post date:** [September 25, 2023, 8:02pm UTC](https://forum.inductiveautomation.com/t/ab-compact-logix-opc-tags-bad-failure-quality/63086/19 "2023-09-25T20:02:27Z")

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If memory serves me right legacy module on 8.1.27 had problems that were fixed in a later release. I wonder if this could be the case as well for the logix driver module in 8.1.27?