Hi everyone:
i know that perhaps, this topic have been posted many times, but in need help.
i have an OKUMA machining center, with OSP-700M control. it has a floppy disc unit for doing bakcups, but it is broken now. Because of it, i have to use the RS-232 port. I tried and i can download from the CNC to my laptop with out any problems, but when i need to upload from the laptop to the control, appear different alarms. One of them is:

#5247: RS232C READ BUFFER OVERFLOW

Other times appears this one:

#5248: RS232C ready interrupt time out.

I think that it´s a problem related with parameters, but i don´t know. i never used this system before, so i need help with it.
THANK YOU FOR HELP ME
MILTON