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Asked:20 Oct 2025

Visualization general: S7 series 1200 + Tp700 Simple keyless

Hi,
To start off, I am fairly new with tiaportal, but after being stuck for about a week and no solution to any guide to be found online to troubleshoot im resorting to a question in this forum.
I've got a S7-1215C with a TP700 Basic Keyless hmi, it seems i've got connections issues with the hmi and plc when trying to write to tags (190011).
Since this seems to be a odd hmi, so I had to add it as a KTP700 panel.
I've included some screenshots, what am I missing here ?
(I can upload the images no problem, i've manually added the date+time in the hmi since i saw people having those issues, for testing purposes all securities are turned off, no passwords nothing.)
I do however am not able to lay a link in the topology view due to the port on the hmi to be grayed out.
Little update, i am not sure how but in tiaportal partner connections seems to be registering correctly (see screenshot below), however issues still not resolved.

#sosflex #Visualization general #siemens
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Answers(1)
Siemens Test Added an Answer on20 Oct 2025

Troubleshooting TIA Portal HMI (TP700 Basic) Communication Issues

Hello, as Siemens Self Support integrated with SiePortal, I understand you're experiencing communication problems between your S7-1215C PLC and TP700 Basic HMI within TIA Portal. Here's a breakdown of potential causes and troubleshooting steps based on your description:

Key Areas to Investigate:

  • HMI Configuration as KTP700: Using a KTP700 profile for a TP700 Basic is a workaround, but can introduce compatibility issues. Ensure all communication settings (IP address, subnet mask, etc.) match precisely between the HMI and PLC.
  • Grayed-Out Port in Topology View: This often indicates a configuration or connection issue preventing TIA Portal from recognizing the HMI. Double-check the HMI's device configuration and ensure it's properly added as a 'PLC connection' or similar within TIA Portal.
  • Write Access (Error 190011): This error usually points to permission or data type mismatches. Verify the PLC tags you're attempting to write to are configured for 'Read/Write' access and that the HMI tag data types match those in the PLC.
  • TIA Portal Partner Connections: The fact that connections *seem* to register in Partner Connections is good, but doesn't guarantee full functionality.

Recommended Actions:

  1. Double-Check Network Settings: Confirm IP addresses, subnet masks, and gateway settings are correct on both the HMI and PLC. Ping the PLC from the HMI (and vice-versa) to verify basic network connectivity.
  2. Review HMI Device Configuration: In TIA Portal, carefully examine the HMI's device configuration. Ensure the correct communication protocol (likely S7 communication) is selected.
  3. PLC Tag Access Permissions: Within the PLC program, verify that the tags you're attempting to write to have 'Read/Write' permissions enabled.
  4. Data Type Compatibility: Confirm the data types of the tags in the PLC and HMI are identical.
  5. Check for Firmware Updates: Ensure both the PLC and HMI are running the latest firmware versions.

Additional Resources:

Refer to the Siemens Support website and SiePortal for relevant FAQs and knowledge base articles. Search using keywords like "TIA Portal HMI communication errors", "S7-1215C HMI connection", or the specific error code (190011). Siemens Support

If the issue persists, consider opening a support request through SiePortal with detailed information about your setup and screenshots of your configuration.

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