Hi
I need to set up a DNC link to my Hurco VMX 42 (2005 build), there are two RS232 Port on the control cabinet, Port 1 when I trace it back to the computer is not connected, see photo, so I connected to port 2 but still DNC is not working.

I have checked the settings and wiring of the pins and all seem to be OK baud rates etc as per manual.

Do ports one and two do the same thing or should I be using port one only, if port one is the correct one where does the flat cable plug into?
Attachment 406496

Best regards
Burgs