# Siemens Server Interface

**URL:** <https://forum.inductiveautomation.com/t/siemens-server-interface/68211>\
**Category:** Ignition\
**Tags:** ignition81\
**Created:** [January 4, 2023, 2:27pm UTC](https://forum.inductiveautomation.com/t/siemens-server-interface/68211 "2023-01-04T14:27:23Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![Michael\_Johannsen](https://avatars.discourse-cdn.com/v4/letter/m/3ab097/32.png) [@Michael\_Johannsen](https://forum.inductiveautomation.com/u/Michael_Johannsen)\
**Post date:** [January 4, 2023, 2:27pm UTC](https://forum.inductiveautomation.com/t/siemens-server-interface/68211/1 "2023-01-04T14:27:24Z")

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Hi.

Does anyone have tried to work with Siemens Server interfaces with OPC ua

I can easy create tags, just like when creating tage direct in the DB also woth OPC ua.

But when making UDT all the tags from the Server interface get a ongoing number.  
I can not see how to make multiply UDTs when the tags only have number the tell them apart.

![image](https://us1.discourse-cdn.com/inductiveautomation/original/3X/8/0/8046d00f94b10af179d21feb9e3d411465dcefa6.png)

![image](https://us1.discourse-cdn.com/inductiveautomation/original/3X/9/a/9a6cab14a8809fefb011b392eccde2aef8acefd5.png)

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**Author:** ![Michael\_Johannsen](https://avatars.discourse-cdn.com/v4/letter/m/3ab097/32.png) [@Michael\_Johannsen](https://forum.inductiveautomation.com/u/Michael_Johannsen)\
**Post date:** [January 6, 2023, 12:41pm UTC](https://forum.inductiveautomation.com/t/siemens-server-interface/68211/2 "2023-01-06T12:41:16Z")

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Solution

> [@Siemens S7-1200 OPC UDT error](https://forum.inductiveautomation.com/t/siemens-s7-1200-opc-udt-error/56756/13):
>
> Thanks for investigating Kevin. As per Matthew’s post, I think that what you have described is only currently possible with the S7-1500 which has more OPC-UA options. Is there a plan for adding the custom address space functionality/new attribute to ignition? I have only tested 2 free OPC-UA clients but they were both able to read the whole structures from the S7-1200. Cheers

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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:** [January 6, 2023, 1:16pm UTC](https://forum.inductiveautomation.com/t/siemens-server-interface/68211/3 "2023-01-06T13:16:53Z")

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If you dig into the Eclipse Foundation's [Milo Project](https://projects.eclipse.org/projects/iot.milo/who), you will find that such features are under active development. My gut sense says not too far off.

However, Milo v1 might be a breaking change for the Ignition v8.1.x series. We'll see.