I've been trying to get another computer with a serial port working to rule out any issues there, but all the old computers I have with the port have issues and I have been unable to get any the boot/work. We have been working under the assumption that the OKK and cable are both working fine. I'm pretty much spent 2 full days on just this and need to get to other work so any help is really appreciated.

I've tried a number of other configurations, all getting one of the above errors or it just times out and says that the device is not ready. If I set it to no flow control I get an 'rs232-c' error while if I set it to hardware or Xon/Xoff I get a 'partity H' error. I tried to match the port settings in windows to match but there is no option for software flow control. It seems like the settings that should be used are the following:

We are trying to send using procomm plus. I've tried pretty much every setting I can think of. I replaced it with another windows XP computer from the same general time the old one was from, but unfortunately the person who set all this up and got it all working died many years ago and no one thought to back anything up.

I replaced the computer but we are having issues getting programs loaded to the machine. Last week we had some bad storms and during some power issues the hard drive on the computer died. There was an old windows XP computer set to send programs to the machine via serial port. Our company has an OKK MCV-520 with a Meldas M2a controller. Please excuse me if I don't explain this well as I am not a machinist myself, just tasked with taking care of this.

Procomm plus windows 7