@Solla-topee Thanks to help me ! I have the latest version tpPLC Utlity . My PC is directly connected via Ethernet cable to PLC. Firewall and antivirus software are disabled. And tpPLC Utility always...

@TPTeeps Thanks for the URL, but after install Wireshark, tpPLC is always down :-(

@Solla-topee I have the same problem with my TL-PA7025P ! TpPLC give always the same message on 2 computers under W10 : " No Device Connected... " Does TpPLC run correctly under W10 ?