Hi guys i hope you are doing well,

I am facing an issue concerning the communication between S7-1500 under TIA v17 and WinCC explorer 7.5 SP2.

The status is showing disconnected.

I have read that when the S7-1500's  firmware version is upper than 2.9 it needs cetificates, so i changed the firmware version to 2.8 and it connected but i wanted to keep my firmware as is and deal with this issue and i don't have ideas about certification.

Please explain me what are these certificates and how to deal with in both TIA and Wincc Explorer sides.

Thanks a lot

Towome

Hi,

You're absolutely right - starting with firmware version 2.9 for the S7-1500, Siemens introduced mandatory secure communication using TLS 1.3, which requires certificates to establish a connection with WinCC Explorer V7.5 SP2 Update 4 or later.

TIA:

In the PLC properties, enable "Secure Communication".
This automatically triggers certificate generation.
Fully compile the hardware and software.
Download both to the PLC to ensure the certificate is active.

Use the SIMATIC SCADA Export Tool (available from Siemens).
Right-click on the PLC in TIA Portal → Export to SIMATIC SCADA → Save as ZIP file.

WinCC V7.5:

In WinCC Tag Management, use the SIMATIC S7-1500 Channel.

Right-click the connection → AS Symbol → Load from file.
Select the ZIP file exported from TIA Portal.

WinCC will prompt to import the certificate—click Yes.

Restart Runtime after importing

 

Regards

 

 Thank you Towome

Additionnaly to your help :

WinCC Runtime ≥ V7.5 SP2 Update 4: No connection to S7-1500 ≥ V2.9 / S7-1200 ≥ V4... - ID: 109805946 - Industry Support Siemens