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No communication between Wincc 7.4 SP1 Update 8 and PLC-1500

4/7/2025 11:37 AM	Rate (0)
Carmendomar_95 Joined: 4/4/2025 Last visit: 4/8/2025 Posts: 3 Rating: (0)	I have a WinCC 7.4 SP1 Update 8 project with SIMATIC NET 14 SP1, and I want to connect to a PLC programmed in TIA Portal 18. However, when I import the export from TIA Portal, the import is OK, but nothing related to the certificates appears, and when I switch to Runtime, it does not connect to the PLC. I have checked the PG/PC interface, the IP address, and the configuration options, and everything is correct. I noticed that on TIA Portal 17 there was not certificated on the export .zip, maybe is related with that? How can i know what is happening? Thank you

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4/10/2025 8:32 AM	Rate (0)
Murof Platinum Expert Joined: 8/3/2009 Last visit: 12/19/2025 Posts: 16612 Rating: (1943)	Hello Carmendomar_95 Your WInCC Version is too old. You need WinCC V7.5Sp2 Upd4 or newer that you can use the Secure HMI connection from the Newer S71500/1200 FW versions. In your case you can only switch off the secure HMI Connection. Check theses FAQs: https://support.industry.siemens.com/cs/de/en/view/109798498 https://support.industry.siemens.com/cs/de/en/view/109805946 Bye Murof
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