# OPC UA struct data type?

**URL:** <https://forum.inductiveautomation.com/t/opc-ua-struct-data-type/26905>\
**Category:** Ignition\
**Created:** [July 26, 2019, 1:13pm UTC](https://forum.inductiveautomation.com/t/opc-ua-struct-data-type/26905 "2019-07-26T13:13:17Z")\
**Posts on this page:** 1\
**Showing post:** 20

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**Author:** ![deon.korb](https://avatars.discourse-cdn.com/v4/letter/d/8c91f0/32.png) [@deon.korb](https://forum.inductiveautomation.com/u/deon.korb)\
**Post date:** [January 15, 2021, 7:33am UTC](https://forum.inductiveautomation.com/t/opc-ua-struct-data-type/26905/20 "2021-01-15T07:33:35Z")

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You cannot have a timer in the struct if you want to read it with OPC UA. Only other structs, atomic member or other UDTs (which also don’t contain timers or other illegal types).

See this thread:  
[http://forum.inductiveautomation.com/t/siemens-s7-1500-opc-ua-struct-with-ton-member/37247](http://forum.inductiveautomation.com/t/siemens-s7-1500-opc-ua-struct-with-ton-member/37247)

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