AXC F 3152 upgrade to FW_2025.0.3 and downgrade

PLCnext Technology & PLCnext Controls
1

Hi All!
Please, add the following note to the change notes for 2025.x:
„DO NOT UPGRADE IF YOU PLAN TO USE OLDER FW VERSIONS.“ Yes, in all caps.
Because after downgrade every time you will load a project to the PLC it disconnects with MSG_ONL0050 and reboots. After „Run“ and „Fail“ blinking.
After rebooting, the project can be downloaded. This slows down development process (I could switch to simulation - but it stuck in 2023 without PROFINET support, so HW only).
It now seems that the PLC should be sent back for reprogramming (why not to add prev. FW version with the fix?). This is not acceptable for a product intended for industrial use.
I hope you will find a „remote“ solution and add a note to the change log.

2

Have you tried to do a Type 1 reset after the downgrade? I have successfully up- and downgraded an AXC F 3152 that way.

3

Thanks phoffmann, I don’t know why - but in my case type1/2 reset isn’t helping in my case.