Zoyo

Hello, I made a small application to my Acer N311 PDA by LabVIEW PDA 8.2 and the application should communicate with a PLC (brand: Moeller). My PDA has a syncron cable wich is IRCOMM --> USB. The PLC has a Serial cable with female plug. My question is: how can I connect to this two ends? So the USB and a female Serial. I know there is plenty of solution for this kind connection like USB to serial cable, but the thing what is not so clear for me, I have to connect that 3rd cable and that's all? or I have to configure something on my application like RxD or TxD?? because the USB has only 4 pin and the serial has 9. So my question is I have to use a nullmodem cable so the RD and the TD have to be crossed or simply and soleny I have to connect this 3 cable and everything is working automaticle? Thanks in advice. B.R. Z