# Issue Importing Structs/UDTs from Siemens TIA S7-1500 into Ignition 8.3 via OPC UA

**URL:** <https://forum.inductiveautomation.com/t/issue-importing-structs-udts-from-siemens-tia-s7-1500-into-ignition-8-3-via-opc-ua/114391>\
**Category:** Ignition\
**Tags:** siemens, ignition81\
**Created:** [March 9, 2026, 11:12am UTC](https://forum.inductiveautomation.com/t/issue-importing-structs-udts-from-siemens-tia-s7-1500-into-ignition-8-3-via-opc-ua/114391 "2026-03-09T11:12:10Z")\
**Posts on this page:** 1\
**Showing post:** 3

<div class="post-metadata">

**Author:** ![Arnaud\_Declerck](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/arnaud_declerck/32/44872_2.png) [@Arnaud\_Declerck](https://forum.inductiveautomation.com/u/Arnaud_Declerck)\
**Post date:** [March 9, 2026, 4:05pm UTC](https://forum.inductiveautomation.com/t/issue-importing-structs-udts-from-siemens-tia-s7-1500-into-ignition-8-3-via-opc-ua/114391/3 "2026-03-09T16:05:05Z")

</div>

If you import a struct, ignition will create a document tag with the value be a json with the tags under that struct. You can then extract to tag value with a derived tags.  
see this [OPC UA struct data type?](https://forum.inductiveautomation.com/t/opc-ua-struct-data-type/26905)

---

_[View the full topic](https://forum.inductiveautomation.com/t/issue-importing-structs-udts-from-siemens-tia-s7-1500-into-ignition-8-3-via-opc-ua/114391)._