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I mean that the PLC did not complete the previous Action file. And you need to give it a USB, not an update firmware, but an Action file with some minor function like Read All settings (TOOLS=>USB Action file Creator). In addition, try to get to PLC through the VNC and look in the Uni Apps what is wrong. If the address 192.168.1.4 is pinged, then it is probably access to the VNC. -
I've done this many times. With nothing connected except power, it boots up with a red blinking ERROR light immediately when the RUN light turns green. -
I always found that upgrading with SD card to be more reliable than USB -
Red blink, Green ON= USB Action ran with error – disconnect the USB drive to dismiss the error. https://i4automation.co.uk/wp-content/uploads/2023/06/Unistream-USC-Series-USB-Actions.pdf
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Yes, I've tried that. The PLC will not acknowledge the USB stick. I'll try with an SD card.
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