ok guys, lets back up a bit, the OP said a FX-48MR, this is one of the first Mitsi PLC's they built. You need a F2-20GF1 converter with a SC03 cable. These items are harder to find than hens teeth. Ask me I know. I have one of these beasts on site, have the converter, the software, no cable. Luckily I do have a hard copy of the program, so the first sign of trouble, its out and becomes a door stopper.
It is different to the FX2 series which use the SC09 cable and the newer FX3 series which use USB, Also to my knowlege, i could be wrong though, the FX series only works with MEDOC
Good luck in finding what you need.
When you guys across the pond read this I will be getting ready to leave and have one of these
. enjoy your weekend