# No signal from sensors

**URL:** <https://community.factoryio.com/t/no-signal-from-sensors/804>\
**Category:** Support\
**Created:** [April 17, 2021, 9:09pm UTC](https://community.factoryio.com/t/no-signal-from-sensors/804 "2021-04-17T21:09:54Z")\
**Posts on this page:** 5\
**Page:** 1

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**Author:** ![nikolai.semin](https://avatars.discourse-cdn.com/v4/letter/n/41988e/32.png) [@nikolai.semin](https://community.factoryio.com/u/nikolai.semin)\
**Post date:** [April 17, 2021, 9:09pm UTC](https://community.factoryio.com/t/no-signal-from-sensors/804/1 "2021-04-17T21:09:54Z")

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Hello everyone!

I unexpectedly bumped into the following problem: sensors in Factory IO does not transmit any signal to TIA Portal. I have created a custom scene and came up with control logic for it, however, **there is no any value from sensors in TIA Portal** and, thus, the whole system does not work. Sensors in Factory IO work as intended and change their value when triggered. I did check addresses, and I should say that my program is still capable of changing values inside the scene; for instance, _RFID 1 Reader command_ can be changed from 0 to 1 and buttons function properly.  
Is there a way to fix it or is something wrong with connection between these two softwares?

I hope that I have explained my problem clear, and if you need any additional info, I can send screenshot/TIA Portal/ Factory IO model.  
Siemens S7-1500, driver - PLC SIM

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**Author:** ![janbumer1](https://dub1.discourse-cdn.com/flex017/user_avatar/community.factoryio.com/janbumer1/32/60_2.png) [@janbumer1](https://community.factoryio.com/u/janbumer1)\
**Post date:** [April 20, 2021, 12:18pm UTC](https://community.factoryio.com/t/no-signal-from-sensors/804/2 "2021-04-20T12:18:29Z")

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You said you did check the addresses. Which addresses did you check?

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**Author:** ![nikolai.semin](https://avatars.discourse-cdn.com/v4/letter/n/41988e/32.png) [@nikolai.semin](https://community.factoryio.com/u/nikolai.semin)\
**Post date:** [April 20, 2021, 12:22pm UTC](https://community.factoryio.com/t/no-signal-from-sensors/804/3 "2021-04-20T12:22:45Z")

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I checked address from tag table.  
The problem is solved already (don’t know how to mark my post):it was discovered that **memory bits for sensors were overlapping with memory for DINT variables** , and I totally missed it.

If anyone else have same problem in future, I hope they can see my post 🙂

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**Author:** ![wayneschaefer](https://dub1.discourse-cdn.com/flex017/user_avatar/community.factoryio.com/wayneschaefer/32/50_2.png) [@wayneschaefer](https://community.factoryio.com/u/wayneschaefer)\
**Post date:** [April 21, 2021, 7:37pm UTC](https://community.factoryio.com/t/no-signal-from-sensors/804/4 "2021-04-21T19:37:38Z")

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Glad you got it figured out …

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**Author:** ![janbumer1](https://dub1.discourse-cdn.com/flex017/user_avatar/community.factoryio.com/janbumer1/32/60_2.png) [@janbumer1](https://community.factoryio.com/u/janbumer1)\
**Post date:** [April 26, 2021, 6:54pm UTC](https://community.factoryio.com/t/no-signal-from-sensors/804/5 "2021-04-26T18:54:47Z")

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Yeah, that was where my question was leading to. Glad you found it! 😉