Hi Oliver,
Thanks again for your support! I wanted to share an update on the issue with the CL3 module staying in Pre-Operational mode and the delayed startup.
The problem was caused by the EDS file not matching the firmware version on the CL3 module. After updating the firmware (provided by Nanotec), the module now transitions correctly to Operational mode after the NMT Start command, and the startup delay is resolved. The SDO errors have also disappeared, and communication is stable now.
If anyone experiences similar issues, I recommend checking that the firmware and EDS file are compatible.
Best regards,
Andreas