# Failed to connect to Ignition OPC UA Server by using node-opcua

**URL:** <https://forum.inductiveautomation.com/t/failed-to-connect-to-ignition-opc-ua-server-by-using-node-opcua/25349>\
**Category:** Ignition\
**Created:** [May 28, 2019, 10:04am UTC](https://forum.inductiveautomation.com/t/failed-to-connect-to-ignition-opc-ua-server-by-using-node-opcua/25349 "2019-05-28T10:04:36Z")\
**Posts on this page:** 5\
**Page:** 2

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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:** [August 16, 2023, 2:41am UTC](https://forum.inductiveautomation.com/t/failed-to-connect-to-ignition-opc-ua-server-by-using-node-opcua/25349/21 "2023-08-16T02:41:21Z")

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The S7 driver has no browse support. From a 3rd party client you wouldn’t see any tags for it, unless you have created Ignition tags that manually address the data, and you have the Exposed Tags feature enabled.

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**Author:** ![chaoliang](https://avatars.discourse-cdn.com/v4/letter/c/ba8739/32.png) [@chaoliang](https://forum.inductiveautomation.com/u/chaoliang)\
**Post date:** [August 16, 2023, 2:47am UTC](https://forum.inductiveautomation.com/t/failed-to-connect-to-ignition-opc-ua-server-by-using-node-opcua/25349/22 "2023-08-16T02:47:50Z")

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Hi Kevin,

Yes, I created tag under tag browser.  
I have enabled "Expose Tag Providers".  
I can drag and drop the configured tag from "Root/Objects/Tag Providers" to the "data View" of Matrikon OPC explorer, but somehow this tag does not have live value displayed, as uploaded in previous reply.

As you mentioned, is it because S7 driver does not support the "browse" function, so the live value won't be displayed?

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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 16, 2023, 2:49am UTC](https://forum.inductiveautomation.com/t/failed-to-connect-to-ignition-opc-ua-server-by-using-node-opcua/25349/23 "2023-08-16T02:49:29Z")

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No, if you have created a tag in Ignition, and you can see it in Matrikon, then it should be fine. If it updates in Ignition it should also update in Matrikon if you’ve subscribed to it. Try UaExpert as well.

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<div class="post-metadata">

**Author:** ![chaoliang](https://avatars.discourse-cdn.com/v4/letter/c/ba8739/32.png) [@chaoliang](https://forum.inductiveautomation.com/u/chaoliang)\
**Post date:** [August 16, 2023, 5:16am UTC](https://forum.inductiveautomation.com/t/failed-to-connect-to-ignition-opc-ua-server-by-using-node-opcua/25349/24 "2023-08-16T05:16:08Z")

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Tried UaExpert. Great Tool.

I can see the live values this time.

Thanks.

Now it's time to move on to the next step to use Nodered or python to read the edge OPC Server tags.

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<div class="post-metadata">

**Author:** ![chaoliang](https://avatars.discourse-cdn.com/v4/letter/c/ba8739/32.png) [@chaoliang](https://forum.inductiveautomation.com/u/chaoliang)\
**Post date:** [August 17, 2023, 6:50am UTC](https://forum.inductiveautomation.com/t/failed-to-connect-to-ignition-opc-ua-server-by-using-node-opcua/25349/25 "2023-08-17T06:50:38Z")

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Refer to the video below, I tried the node red as OPC UA client, it works.

[![](https://us1.discourse-cdn.com/inductiveautomation/original/3X/9/d/9d8fe99bd4296ae871f4455d3796f35070483ecc.jpeg "IoT Project - Using Node Red as an OPC-UA Client Locally") ](https://www.youtube.com/watch?v=S4GO63r_8Co)

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