Plc

i have come across a faulty PLC. Its model is Mitsubishi FX2-48MR-D. I suspect the programme is corrupted. I also have the necessary software with me. But some how i didn't manage to establish the connection between my computer and PLC. I figured out the pin configuration of the cable i used should be wrong. I have the ability to make a cable my self and i obtained few data sheets about how to do it. But the data sheets i obtained are contrasting and I'm not sure which one is correct.
So can someone please help me out on obtaining the correct pin configuration.
PS- PLC has 25 pin input.