# PLCSIM V19 connects to Factory IO but not working

**URL:** <https://community.factoryio.com/t/plcsim-v19-connects-to-factory-io-but-not-working/4480>\
**Category:** Support\
**Created:** [December 29, 2025, 1:02pm UTC](https://community.factoryio.com/t/plcsim-v19-connects-to-factory-io-but-not-working/4480 "2025-12-29T13:02:35Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![jonathan.widodo.2309](https://avatars.discourse-cdn.com/v4/letter/j/22d042/32.png) [@jonathan.widodo.2309](https://community.factoryio.com/u/jonathan.widodo.2309)\
**Post date:** [December 29, 2025, 1:02pm UTC](https://community.factoryio.com/t/plcsim-v19-connects-to-factory-io-but-not-working/4480/1 "2025-12-29T13:02:35Z")

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Hello everyone

i have trouble with my simulation factory IO. I have followed the steps to connect to Factory IO, and I have successfully connected, but I cannot perform a simple simulation. My lights are off but the condition is connected to PLCSIM. i am use factory io 2.2.3 and TIA Portal V19

Any idea why this happens?

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**Author:** ![adriana.silva](https://dub1.discourse-cdn.com/flex017/user_avatar/community.factoryio.com/adriana.silva/32/752_2.png) [@adriana.silva](https://community.factoryio.com/u/adriana.silva)\
**Post date:** [January 2, 2026, 9:06am UTC](https://community.factoryio.com/t/plcsim-v19-connects-to-factory-io-but-not-working/4480/2 "2026-01-02T09:06:05Z")

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Hello @jonathan.widodo.2309,

Welcome to the forum!

Factory I/O 2.2.3 was released about 5 years before TIAPortal V19, and as such, it might not be ready to properly communicate with it.  
Could you update your Factory I/O to the latest version? Or is there some reason to use such an older version of Factory I/O?

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**Author:** ![jonathan.widodo.2309](https://avatars.discourse-cdn.com/v4/letter/j/22d042/32.png) [@jonathan.widodo.2309](https://community.factoryio.com/u/jonathan.widodo.2309)\
**Post date:** [January 13, 2026, 4:22am UTC](https://community.factoryio.com/t/plcsim-v19-connects-to-factory-io-but-not-working/4480/3 "2026-01-13T04:22:49Z")

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Thank you Adriana, now I have solved the problem and changed to the latest version.

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**Author:** ![adriana.silva](https://dub1.discourse-cdn.com/flex017/user_avatar/community.factoryio.com/adriana.silva/32/752_2.png) [@adriana.silva](https://community.factoryio.com/u/adriana.silva)\
**Post date:** [January 13, 2026, 8:41am UTC](https://community.factoryio.com/t/plcsim-v19-connects-to-factory-io-but-not-working/4480/4 "2026-01-13T08:41:21Z")

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Hi @jonathan.widodo.2309,

I’m glad you got it working! If you ever need help, don’t hesitate to reach out.