# OPC Tag to Indicate Redundancy Status

**URL:** <https://forum.inductiveautomation.com/t/opc-tag-to-indicate-redundancy-status/18221>\
**Category:** General Discussion\
**Created:** [May 30, 2018, 1:27pm UTC](https://forum.inductiveautomation.com/t/opc-tag-to-indicate-redundancy-status/18221 "2018-05-30T13:27:52Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![matsons](https://avatars.discourse-cdn.com/v4/letter/m/e9c0ed/32.png) [@matsons](https://forum.inductiveautomation.com/u/matsons)\
**Post date:** [May 30, 2018, 1:27pm UTC](https://forum.inductiveautomation.com/t/opc-tag-to-indicate-redundancy-status/18221/1 "2018-05-30T13:27:52Z")

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We have some non-Ignition applications using Ignition’s OPC-UA server as their data source. We are thinking that the application will need to be able to tell if/when the Master Ignition gateway has failed over to the Backup. We realize that if the server stops responding we should just switch over to the backup, but if the gateway is up and active is there a way to read this status from the OPC-UA server?

Thank you

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**Author:** ![paul-griffith](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/paul-griffith/32/37249_2.png) [@paul-griffith](https://forum.inductiveautomation.com/u/paul-griffith)\
**Post date:** [May 30, 2018, 2:50pm UTC](https://forum.inductiveautomation.com/t/opc-tag-to-indicate-redundancy-status/18221/2 "2018-05-30T14:50:15Z")

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You can have the two UA servers set to ‘Expose Tag Providers’ ([https://docs.inductiveautomation.com/display/DOC79/OPC-UA+Connections+and+Settings#OPC-UAConnectionsandSettings-IgnitionOPC-UAServer](https://docs.inductiveautomation.com/display/DOC79/OPC-UA+Connections+and+Settings#OPC-UAConnectionsandSettings-IgnitionOPC-UAServer)) which would give you access to the tags in the `System` provider.

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**Author:** ![matsons](https://avatars.discourse-cdn.com/v4/letter/m/e9c0ed/32.png) [@matsons](https://forum.inductiveautomation.com/u/matsons)\
**Post date:** [May 30, 2018, 8:59pm UTC](https://forum.inductiveautomation.com/t/opc-tag-to-indicate-redundancy-status/18221/3 "2018-05-30T20:59:26Z")

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Thanks for the reply.

I enabled the Expose Tag Providers setting but I do not have any items to view under:  
Ignition OPC-UA Server\Configured Tags\System\Gateway

I am using the Quick Client through the browser to test it.  
I am using Ignition 7.9.7

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<div class="post-metadata">

**Author:** ![paul-griffith](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/paul-griffith/32/37249_2.png) [@paul-griffith](https://forum.inductiveautomation.com/u/paul-griffith)\
**Post date:** [May 30, 2018, 9:04pm UTC](https://forum.inductiveautomation.com/t/opc-tag-to-indicate-redundancy-status/18221/4 "2018-05-30T21:04:07Z")

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Dangit, I was hoping you weren’t gonna say that. There’s an issue with exposing tag providers in 7.9.7 (but only 7.9.7; it’s fine in 7.9.6, and fixed for 7.9.8).