WHICH PINS WOULD I USE TO XFER DATA FROM RS485 SCREW TERMINALS TO RS 232 DB9 CONNECTOR. 7&8?

 

It's not a pin thing, unless you're saying you have an RS485 port that happens to be using a DB9. RS485 and RS232 and different electrically.

 

I wouldn't connect any RS-485 terminals to any RS-232 wiring points. Each runs on a different voltage standard. Something might fry and smoke.

RS-232 to RS-485 converters are made to bridge the different electrical conditions. Any commercial converter will come with some identification for which terminal is which.

http://lmgtfy.com/?q=RS-232+to+RS-485+converter

 

Thanks Already had a 232 to 485 converter. Everything worked out ok. Device that we were linking data to was not picture clear in its manual. After looking @ schematic of converter, figured it out.