# Issue with Communication between Siemens PLC and HMI via Profinet

**URL:** <https://forumautomation.com/t/issue-with-communication-between-siemens-plc-and-hmi-via-profinet/12640>\
**Category:** Siemens\
**Created:** [October 1, 2024, 4:02am UTC](https://forumautomation.com/t/issue-with-communication-between-siemens-plc-and-hmi-via-profinet/12640 "2024-10-01T04:02:23Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![danieldelex](https://forumautomation.com/letter_avatar_proxy/v4/letter/d/ebca7d/32.png) [@danieldelex](https://forumautomation.com/u/danieldelex)\
**Post date:** [October 1, 2024, 4:02am UTC](https://forumautomation.com/t/issue-with-communication-between-siemens-plc-and-hmi-via-profinet/12640/1 "2024-10-01T04:02:23Z")

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Hello

I’m working on a project involving a Siemens S7-1200 PLC and a Siemens HMI. I’m trying to establish communication between the two using Profinet; but I’m facing issues where the HMI fails to receive data from the PLC consistently. 🙃

The PLC seems to be functioning correctly; and the Profinet connection appears to be configured as per the manual. I have checked [Siemens - Industrial Automation, PLC Programming, scada & Pid Control System](https://forumautomation.com/c/plc-programmable-logic-controllers/siemens/21) reference guide but still need help.

Has anyone faced similar issues with intermittent communication between Siemens PLCs and HMIs via Profinet?

Any advice on troubleshooting / settings I might have missed would be appreciated.

Thank you ! 🙂