DNC RS232 Faunc 3T Cable Pinout
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  1. #1
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    Default DNC RS232 Faunc 3T Cable Pinout

    Does anybody know the correct RS232 cable pin out for connecting a 9-pin serial to a 25-pin on a Fanuc 3T control?

    I am using DNC4U with a laptop with a serial port.
    I am able to download from the CNC to the PC but I cannot upload to the CNC from the PC.

    DNC4U sends the code, but the CNC control wont "take" it.
    The control shows a flashing "LSK" in the bottom right corner, and won't stop unless I keep pressing reset.


    I've spent a while looking at different pin out configurations and there seems to be conflicting information.


    If it helps at all the machine is a Citizen Cincom F12.

    Thank you,

  2. #2
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    The 25 pin (Fanuc side) to 9 pin PC side is correct for a cable when using XON/XOFF handshaking. You do not need the jumped pins on the 9 pin side.

    cable.jpg

    Be sure the file you are trying to send is formatted correctly. It should have a % sign then on the next line should be the program number. The ASCII characters for LF and CR should be used for the end of block.
    Last edited by Vancbiker; 05-23-2020 at 09:05 AM.

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  4. #3
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    That pinout did it - thank you sir,



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