I am trying to download a DPRINT (POPEN,PCLOS) command to some equipment using the USB port on my PC, which runs XP. I have installed a USB/RS232 convertor and have a 9 pin RS232 cable going to my equipment. The data does not transfer and I think it must be that the USB port does not suppport the DPRINT command. If I try downloading data without the DPRINT command I can transfer data. Can anyone help?
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