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  1. #1
    First have a look at peramiter options in the manual.
    Looking at another drive, I spotted that the next perameter after the baud rate value was for communication bits.
    It stated that 0 was for no error checking and 1 was for stop bit.

    Have a read through and see if you get a lightbulb moment.
    I admit I know nothing of vfd's.

    On another note.
    I came across a plugin / driver that said it was needed for Mach3 for HY vfd's to make it modbus compliant. Could this be a possible scenario with linux?.

  2. #2
    Quote Originally Posted by dazp1976 View Post
    It stated that 0 was for no error checking and 1 was for stop bit.
    Just to discount this - this is part of the serial protocol used to communicate with the VFD and is used for the framing of the individual packets of data. Not to be confused with the VFD operation.

    Basically, it helps the comms between the computer and the VFD, nothing else.

  3. #3
    Quote Originally Posted by Doddy View Post
    Just to discount this - this is part of the serial protocol used to communicate with the VFD and is used for the framing of the individual packets of data. Not to be confused with the VFD operation.

    Basically, it helps the comms between the computer and the VFD, nothing else.
    Ok.
    So it's the normal I/O outputs to relays / contactors and estop circuits doing the work then.
    Good to know.

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