# Question about "The optimized block access must be turned off"

**URL:** <https://forum.inductiveautomation.com/t/question-about-the-optimized-block-access-must-be-turned-off/33780>\
**Category:** Ignition\
**Created:** [April 8, 2020, 1:14pm UTC](https://forum.inductiveautomation.com/t/question-about-the-optimized-block-access-must-be-turned-off/33780 "2020-04-08T13:14:04Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![ott.andrew33](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/ott.andrew33/32/44625_2.png) [@ott.andrew33](https://forum.inductiveautomation.com/u/ott.andrew33)\
**Post date:** [April 8, 2020, 1:14pm UTC](https://forum.inductiveautomation.com/t/question-about-the-optimized-block-access-must-be-turned-off/33780/1 "2020-04-08T13:14:04Z")

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Does the below setting need to be unchecked for all blocks in TIA Portal?

"Optimized Block Access"

I got this information from the link below:

> **[Siemens | Ignition User Manual](https://docs.inductiveautomation.com/docs/8.1/ignition-modules/opc-ua/opc-ua-drivers/siemens#considerations-for-1200-and-1500-devices)**
>
> The Siemens drivers in Ignition support basic connections to S7 devices. Ignition connects to these PLCs via TCP/IP using the S7 protocol. Similar to Modbus and some Allen Bradley connections, the Siemens S7 devices do not support tag browsing. You...

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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:** [April 8, 2020, 1:14pm UTC](https://forum.inductiveautomation.com/t/question-about-the-optimized-block-access-must-be-turned-off/33780/2 "2020-04-08T13:14:56Z")

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I think it’s only the DBs you intend to access with the driver.

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**Author:** ![ott.andrew33](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/ott.andrew33/32/44625_2.png) [@ott.andrew33](https://forum.inductiveautomation.com/u/ott.andrew33)\
**Post date:** [April 8, 2020, 1:17pm UTC](https://forum.inductiveautomation.com/t/question-about-the-optimized-block-access-must-be-turned-off/33780/3 "2020-04-08T13:17:58Z")

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Okay, thanks for the quick reply @Kevin.Herron

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**Author:** ![zxcslo](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/zxcslo/32/61610_2.png) [@zxcslo](https://forum.inductiveautomation.com/u/zxcslo)\
**Post date:** [April 8, 2020, 4:59pm UTC](https://forum.inductiveautomation.com/t/question-about-the-optimized-block-access-must-be-turned-off/33780/4 "2020-04-08T16:59:03Z")

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Yes, only the DBs you intend to access…