Not directly. RS-485 is a differential bus whereas RS-232 is a single-ended bus. The physical transceivers for RS-232 and RS-485 are different, and thus are not configurable. There are some off-the-shelf convertors that go between RS-485 and RS-232. Which model you need will depend on the features you're looking for: connectors, max baud rate, surge protection, power source, isolation, etc."
A similar question on Developer Zone: "Can I use RS-485 port as RS-232?"
