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Problem communicate S7-1200 with KTP400 after use TIA Portal V20

Created by: Supernova_KH at: 4/26/2025 9:07 AM (2 Replies)

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4/26/2025 9:07 AM	Rate (0)
Supernova_KH Member Joined: 12/15/2019 Last visit: 5/7/2025 Posts: 3 Rating: (0)	Hello expert, I have problem with communication between my S7-1200 V4.7 and KTP400 runtime image V17. Before I use TAI Portal V16 it work properly but after I switch to use TIA Portal V20 I face problem connection between CPU to HMI. I also try check date/time, Uncheck only allow secure connection but it still not work.
	Last edited by: Supernova_KH at: 04/26/2025 09:08:15 wrong detail
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4/26/2025 9:29 AM	Rate (0)
Hati Platinum Member Joined: 9/21/2012 Last visit: 9/6/2025 Posts: 4704 Rating: (510)	Change the HMI version to v16 in the HW config and download the changes to the PLC and HMI. If it starts vorking after that, your issue has been the security sertificate.

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5/2/2025 5:38 AM	Rate (0)
Tarwar Member Joined: 7/31/2020 Last visit: 9/4/2025 Posts: 85 Rating: (6)	Hello, here are three links that might be helpful. https://support.industry.siemens.com/cs/ww/en/view/109803668 https://support.industry.siemens.com/cs/ww/en/view/109820712 https://support.industry.siemens.com/cs/de/de/view/109800515 Greetings

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