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  1. pynl02
  2. PLCnext Technology & PLCnext Controls
  3. Wednesday, 07 August 2019

I tried to downgrade my AXC F 2152 from 2019.6 to 2019.3. But now the D-LED is constantly orange.An access to the PLC by PLCnext Engineer is not possible, by using WinSCP an access is possible.
I tried to update to version 2019.6 again and the PLC starts working again.
But this version seems not to work correctly when using Profinet and/ or the local bus.

I also did a factory reset befor my second downgrade attempt but it does not work.

Can you help me with this and tell me what I can do to make 2019.3 work again?

Oliver PLCnext Team Accepted Answer Pending Moderation

you can do a type 1 reset after downgrading to get 2019.3 to work again.
(use the button on the device instead of the PLCnext engineer)

Or delete the content of the "upperdir" folder and reboot.
please note that all the changes you made and the downloaded project will be lost through this. (IP will be reset , users deleted ect.)

 sudo passwd; su root ; cd /media/rfs/rw/upperdir ;rm -R *; rm -R .rnd

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