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  1. #1
    Join Date
    Jan 2017
    Posts
    1

    Fanuc 18T 401 alarm

    I have a Hardinge conquest T51SP with a Fanuc 18T, I'm getting a 401 X & A axis vrdy off alarm, went through a lot of the wiring looking for loose connections but no luck any suggestions?

  2. #2
    Check items
     Is the PSM control power supply on?
     Has an emergency stop been canceled?
     Is a terminating connector connected to the JX1B connector of the
    terminating amplifier?
     Is MCC on? If there is an external MCC sequence in addition to the
    MCC contact of the PSM, check that sequence also.
     Is the power for driving MCC supplied?
     Is the breaker on?
     Has some alarm been issued in the PSM or SPM?
    If no problem is found in the power magnetic circuit around the amplifier,
    replace the servo amplifier.
    If the above action does not solve the problem, replace the axis control
    cards.
     Example of connection
    around the amplifier
    (Typical example)
     Replacing the servo
    amplifier
     Replacing the axis
    control cards

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