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Thread: SINAMICS S120: Fehler MC421 Gerät hat sich abgeshaltet - mögliche Ursache?

  1. #1
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    Hallo zusammen,

    bei einer unserer Anlagen kommt es immer mal wieder sporadisch vor, dass diese ohne ersichtlichen Grund stehen bleibt.
    In der Steuerung habe ich nun mal nachschauen können, was da so im Meldepuffer steht (siehe Bild).
    Frequenzumrichter sind Siemens S120.
    Hat jemand eine Idee, was die Ursache für die Meldung "MC421: Antrieb/Aktor hat sich abgeschaltet" sein könnte?
    Lockere Verbindung der Profinet-Verkabelung o.ä.?

    Danke schonmal für Eure Hinweise.
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    Reply With Quote Reply With Quote SINAMICS S120: Fehler MC421 Gerät hat sich abgeshaltet - mögliche Ursache?  

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    Am besten mal auf per Starter auf dem Antrieb die History angucken. MC421 sagt eigentlich das du am Antrieb gucken musst.
    Gruß

    blackpeat

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    Wenn ich so nachlese, dann könnte das mit den Safety-Funkionen zusammenzuhängen.

    Safety functions in the drive
    Safety functions ("Safety Integrated Basic Functions") in the SINAMICS drive are
    safety-oriented, internal drive functions with the goal of shutting down the respective drive
    safely. In addition, additional safety functions are available to monitor definable limits
    ("Safety Integrated Extended Functions"). The goal of these safety functions is to monitor
    that the respective limit is maintained, to signal the violation or to subsequently shut down
    the drive safely. To prevent the monitoring function from being triggered, it is necessary to
    switch the axis to the monitored operating mode with the user program or to keep it in
    this mode.
    The cooperation of the safety functions in the drive and the SIMATIC S7-1500 and
    S7-1500T are necessary to ensure fault-free plant operation.
    The technology objects speed axis, positioning axis and synchronous axis support the
    "Safety Integrated Basic Functions" of the drive. The technology object detects that the
    Basic Safety function is triggered and displays a corresponding warning (technology alarm
    550 - alarm response: Track setpoints) or alarm (technology alarm 421 - alarm response:
    Remove enable).
    No additional response must take place in the user program, especially for technology
    alarm 550, at the "Enable" input of the Motion Control instruction "MC_Power" in the sense
    of a "shutdown". Shutdown of the Motion Control instruction "MC_Power" by the user after
    technology alarm 421 is possible but not necessary.
    After acknowledgment and release of the drive by the actual safety function, the technology
    alarm can also be acknowledged at the respective technology object with the Motion Control
    instruction "MC_Reset". The technology object is then enabled automatically,
    if "MC_Power.Enable" is still "TRUE".
    The "Safety Integrated Extended Functions" are not supported by the technology
    object independently.
    To prevent the extended safety functions from being triggered and thus preventing a
    disruption in plant operation, we recommend that you evaluate the status of the safety
    functions. This evaluation can take place in the user program by using or evaluating the
    status information of the "Safety Info Channels" (SIC). With the help of the corresponding
    Motion Control instruction, the axis can now stay within the monitored limit or reach it before
    a deviation is detected.
    Gruß
    Ralle

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