ACH550 brake chopper activation
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  1. #1
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    Default ACH550 brake chopper activation

    Hi all,
    I am new to this forum and am looking for someone familiar with the electronics of the ABB ACH550-024A-2 product. I have purchased one of these units to run a table saw, specifically to convert single to three phase. I want to enable the internal brake chopper which is disabled on this model. The ACS550 has the chopper enabled. The ACH has the exact same part number power and logic boards as the ACS and I have physically confirmed that the hardware exists. I suspect that when one orders the logic board, it is either flashed for ASH or ASC. Since my application is so simple, all I really want is to activate the internal chopper. The control difference appears to be that the ACH has no access to the 2005 command whereas the ACS does access this command.

    My questions:
    Is there hidden access to any, specifically, the 2005 command on the ACH550?
    Is it possible to reflash the logic board to an ACS model?
    Short of a SW solution, is there a HW mod one can make to enable the internal chopper?

    Thanks in advance for any assistance anyone can offer!!

  2. #2
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    Welcome!
    I get that the application is to be woodworking machine related so glad to have you and will leave it stand.
    However, you might get more response or attention cross posting this in the Electric forum.

    http://www.practicalmachinist.com/vb...rters-and-vfd/

    smt

  3. #3
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    Agreed, new to furum and did not see/know that section existed!! Don't know if there is a way to shift it over(?)

  4. #4
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    I'm supposed to know how to do that and have in the past, lol.
    So will address if you prefer.

    But no problem if you just copy and paste a duplicate there, too.

    smt

  5. #5
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    I moved/copied this discussion to the "Transformers, Phase Converters and VFD section". Sorry for the confusion!!


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