# Why I cant able to access the write in IO engineering?

**URL:** <https://tech-community.robotics.abb.com/t/why-i-cant-able-to-access-the-write-in-io-engineering/11955>\
**Category:** RobotStudio\
**Created:** [June 17, 2025, 11:17am UTC](https://tech-community.robotics.abb.com/t/why-i-cant-able-to-access-the-write-in-io-engineering/11955 "2025-06-17T11:17:28Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![akileswar1606](https://avatars.discourse-cdn.com/v4/letter/a/22d042/32.png) [@akileswar1606](https://tech-community.robotics.abb.com/u/akileswar1606)\
**Post date:** [June 17, 2025, 11:17am UTC](https://tech-community.robotics.abb.com/t/why-i-cant-able-to-access-the-write-in-io-engineering/11955/1 "2025-06-17T11:17:28Z")

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[Annotation 2025-06-17 164529.png](https://dhvaniresearch2-my.sharepoint.com/:i:/g/personal/akileswar_dhvani-research_com/EVTIdfiZqyZCoZWYPMMGMm4BTy-E2znwwVMwRdSNJOIUJQ?e=NWZus2)

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**Author:** ![matti](https://avatars.discourse-cdn.com/v4/letter/m/e480ec/32.png) [@matti](https://tech-community.robotics.abb.com/u/matti)\
**Post date:** [June 24, 2025, 12:01pm UTC](https://tech-community.robotics.abb.com/t/why-i-cant-able-to-access-the-write-in-io-engineering/11955/2 "2025-06-24T12:01:52Z")

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Hallo, it seems you are working offline with a station/virtual controller.  
In that case, no write access is required.  
Just add an I/O unit and you should be able to define signals here.  
matti