PLC ET200SP Siemens via Profinet with UR16e

Hi all

I am having a problem in communicating via profinet with a UR16e together with a Siemens PLC ET200SP.
The Profinet on the UR is enabled but it does not go green and connected stays yellow and running.
The PLC gives me the the following error when tries to connect to the UR:

  • IO device failure - Time out in acyclic PROFINET Services

What could be the problem?
Please reply as fast as possible because I have a demo on thursday 18th May 2023 and I am really stuck from yesterday.
Thanks in advance.
Kind Regards