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  1. psalibe
  2. PLCnext Technology & PLCnext Controls
  3. Wednesday, 13 October 2021
We updated our AXC F 2152 from firmware version 2020.6 to 2021.6 today. All went smoothly until rebooting and now we cannot access our HMI Webserver on the computer or the HMI screen we have. When I go to the webserver it has our screen loaded in the background (values not updating) but continually says "A connection with the PLC could not be established" and retries over and over. Attached below is a screenshot of that. I saw this happened once before on a 2020.2 firmware but we'd really like to get our HMI back up and running. The weirdest part is we can in fact connect and control from the PLCNext program.

Controller AXC F 2152 Version 00/2020.0
HW: 03 FW: 2021.6.0
Attachments (1)
Frank PLCnext Team Accepted Answer Pending Moderation
Hi psalibe,

it might be possible that some older and/or incompatible files were still stored in the overlay filesystem Overlay_file_system.

The easiest would be to perform a type 1 reset to restore the overlay and remove older project parts.
You can do this with via PLCnext Engineer (Cockpit --> Reset to factory defaults), Reset Button or via shell Recovery via shell.

Please let us know if this resolves the issue.

Have a great weekend,
Phoenix Contact Electronics Headquarter - PLCnext Runtime Product Management and Support
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