Connection of FActory IO to Siemens PLC CPU 314C -2 PtP

Good day.

I humbly request for information on how to link the physical PLC to factory IO. I am using Siemens S7 300 CPU314C-2 PtP. I use a Profibus to ethernet converter and it is working well between the Siemens PLC and the laptop. The IP address is ok as I can download and accesses the PLC from my Laptop.

After entering the IP address onto the Factory IO, it comes with an error message “Failed to read/write:ComDrvS7 Error#706:Error: One or more operands could not be written!”.

May you please advise.

Thank you.