# Can't connect to Siemens S7-1200

**URL:** <https://forum.inductiveautomation.com/t/cant-connect-to-siemens-s7-1200/86416>\
**Category:** Ignition\
**Created:** [February 27, 2024, 9:45am UTC](https://forum.inductiveautomation.com/t/cant-connect-to-siemens-s7-1200/86416 "2024-02-27T09:45:59Z")\
**Posts on this page:** 3\
**Page:** 1

<div class="post-metadata">

**Author:** ![grzegorz.kaczmarczyk](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/grzegorz.kaczmarczyk/32/24167_2.png) [@grzegorz.kaczmarczyk](https://forum.inductiveautomation.com/u/grzegorz.kaczmarczyk)\
**Post date:** [February 27, 2024, 9:45am UTC](https://forum.inductiveautomation.com/t/cant-connect-to-siemens-s7-1200/86416/1 "2024-02-27T09:45:59Z")

</div>

Hi,

I'm having problem with communicating to PLC Siemens S7-1200. I've considered the settings, that must be made to connect:

> **[Connecting to Siemens S7-1200 and S7-1500](https://support.inductiveautomation.com/hc/en-us/articles/360047576831-Connecting-to-Siemens-S7-1200-and-S7-1500)**
>
> The following considerations, and configuration changes, must be made when connecting to the S7-1200 and S7-1500 devices
> 
> Only global DBs can be accessed
> The optimized block access must be turned o...

What else should I check?

![siemens](https://us1.discourse-cdn.com/inductiveautomation/original/3X/d/d/dda5a01e8fb504be2bf6ad81a435be71e1641367.png)

---

<div class="post-metadata">

**Author:** ![taglias](https://avatars.discourse-cdn.com/v4/letter/t/54ee81/32.png) [@taglias](https://forum.inductiveautomation.com/u/taglias)\
**Post date:** [February 27, 2024, 12:19pm UTC](https://forum.inductiveautomation.com/t/cant-connect-to-siemens-s7-1200/86416/2 "2024-02-27T12:19:17Z")

</div>

There is nothing else to do (other than creating DBs that are not optimized, but that has nothing to do with the connection status).  
Are you sure you can ping the IP address of the PLC and that there is no firewall blocking port 102?

---

<div class="post-metadata">

**Author:** ![pturmel](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/pturmel/32/3295_2.png) [@pturmel](https://forum.inductiveautomation.com/u/pturmel)\
**Post date:** [February 27, 2024, 1:30pm UTC](https://forum.inductiveautomation.com/t/cant-connect-to-siemens-s7-1200/86416/3 "2024-02-27T13:30:33Z")

</div>

Did you power-cycle the PLC after changing and downloading the required hardware settings?