If you have a working RS232 setup then you use the selection "99" and the file names ALL1, ALL2, and ALL3 on the I/O page to send the parameters and ladder to the PC.
Once you get that far we can go over the initialization.
Why do you want to initialize the control anyway? If you are experiencing some kind of high level system alarm that requires initialization to try to clear then you might not be able to do a backup procedure.