# Connecting to integrated S7 1500 OPC server

**URL:** <https://forum.inductiveautomation.com/t/connecting-to-integrated-s7-1500-opc-server/27799>\
**Category:** Ignition\
**Created:** [August 27, 2019, 2:10pm UTC](https://forum.inductiveautomation.com/t/connecting-to-integrated-s7-1500-opc-server/27799 "2019-08-27T14:10:57Z")\
**Posts on this page:** 1\
**Showing post:** 8

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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 28, 2019, 11:19am UTC](https://forum.inductiveautomation.com/t/connecting-to-integrated-s7-1500-opc-server/27799/8 "2019-08-28T11:19:27Z")

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You have to access structures as a whole rather than subscribing to individual components or you will suffer a huge performance hit.

This requires some of extra work on the Ignition side, though. I outlined the general strategy in [this post](http://forum.inductiveautomation.com/t/opc-ua-struct-data-type/26905/2?u=kevin.herron).

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