Parity error


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Thread: Parity error

  1. #1
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    Default Parity error

    New problem today
    Can punch but not send a program. Get parity error sometimes other times nothing at all. Machine triggers pc to send program.
    Rs232 test passed
    Tried another pc and cable from my other fadal. No different
    Swapped rs232 cards. No change
    All settings correct
    A little stumped now. Any ideas?

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    Default Re: Parity error

    ...something to check is how old is the CPU memory Battery. I just went thru this problem of Transmit/Receive to my 2005 VMC4020 and it turned out to be battery.
    https://www.fadalcnc.com/ele-0082.html
    Turn POWER OFF and check with a volt meter. This video shows how to replace without damaging the PCB


    DJ

    Last edited by machinehop5; 04-05-2020 at 11:15 AM. Reason: link


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    Default

    Quote Originally Posted by machinehop5 View Post
    ...something to check is how old is the CPU memory Battery. I just went thru this problem of Transmit/Receive to my 2005 VMC4020 and it turned out to be battery.
    https://www.fadalcnc.com/ele-0082.html
    Turn POWER OFF and check with a volt meter. This video shows how to replace without damaging the PCB


    DJ
    Checked battery 3.67v so it's good.
    Perfoemed the following with no success
    Swapped rs232 card with known good one
    Swapped cpu board with known good one
    Swapped rs232 cable from cab to board with known good one
    Swapped pc
    Swaped pc cable

    Then installed the suspect gear on another fadal and it all worked fine so the hardware is good.
    Maybe another card has issues



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    Member machinehop5's Avatar
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    Default Re: Parity error

    19200 baud, Even, 7, 1, software flow XON/XOFF is want I use. TA,1,0,0 first line of program



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    Default Re: Parity error

    Check your machine grounding. I had a heck of a time with "parity errors" that all went away when I moved the machine to the other side of the shop.



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    Quote Originally Posted by machinehop5 View Post
    19200 baud, Even, 7, 1, software flow XON/XOFF is want I use. TA,1,0,0 first line of program
    All sorted. Made a new cable tried a third pc and all worked.
    I think both cables have 'well used' db9 plugs so will swap them out with new ones
    Thanks for the assistance



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