Red blink, Green ON= USB Action ran with error – disconnect the USB drive to dismiss the error.
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https://i4automation.co.uk/wp-content/uploads/2023/06/Unistream-USC-Series-USB-Actions.pdf
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Well, I would try again with USB stick preparing it previously, see https://support.unitronics.com/index.php?/selfhelp/view-article/Prepare-Disk-on-Key-DOK-or-SD-card-to-work-with-PLC
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Thanks for the suggestion. Just tried it and I can ping 192.168.1.4 from a command prompt, but UniLogic says "Ping was not successful" and can't connect. Very odd!
I closed UniLogic, opened it again, started a New Project, tried to connect via Ethernet and still get the red "X". Checked my Windows command prompt and, yes, still pings successfully.