first, did you read the whole protocol document, and do you understand what you need?

If you did, that with the limited info you posted, i'd venture to say that Power on is X001X in Ascii, and Power off is X002X in Ascii.

So in ID you would make sure the HEX box is unchecked, and put those strings in.

depending on what the protocol doc says, you may or may not need a carriage return or line feed. And you may or may not need a null modem.

Since RTI has no 2 way driver for that model you will get no feedback.

I assume you want to control it with 232 b/c they have no discrete IR commands?

If you are new to RS232, i'd suggest reading some posts in the 232 forum.