# Tank Level Fill PLCSIM not reading inputs or outputs

**URL:** <https://community.factoryio.com/t/tank-level-fill-plcsim-not-reading-inputs-or-outputs/1189>\
**Category:** Drivers\
**Created:** [December 5, 2021, 1:30pm UTC](https://community.factoryio.com/t/tank-level-fill-plcsim-not-reading-inputs-or-outputs/1189 "2021-12-05T13:30:28Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![user57](https://avatars.discourse-cdn.com/v4/letter/u/e480ec/32.png) [@user57](https://community.factoryio.com/u/user57)\
**Post date:** [December 5, 2021, 1:30pm UTC](https://community.factoryio.com/t/tank-level-fill-plcsim-not-reading-inputs-or-outputs/1189/1 "2021-12-05T13:30:28Z")

</div>

I’m using PLCSIM S7-300. On other scenes I can input and output all types of data.

It’s only on “Level Control” scene that I can input/output discrete, but both DWORD and WORD are unable to pass along any data to or from PLCSIM.

Example screenshot  
[![Imgur](https://europe1.discourse-cdn.com/flex017/uploads/factoryio/original/1X/25f668ff7592249f1d8a1f93192d3a48ccc2df1d.jpeg "imgur.com") ](https://imgur.com/GlBaDIL)