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IndustryArena Forum > Machine Controllers Software and Solutions > Fanuc > 401 SERVO ALARM : Y AXIS VRDY OFF
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  1. #1
    Join Date
    Oct 2010
    Posts
    13

    401 SERVO ALARM : Y AXIS VRDY OFF

    I have alarm on my Omnitech sellex pal with fanuc control
    401 SERVO ALARM : Y AXIS VRDY OFF
    401 SERVO ALARM : A AXIS VRDY OFF

    Can somebody help me with that ?Click image for larger version. 

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  2. #2
    Join Date
    May 2016
    Posts
    526

    Re: 401 SERVO ALARM : Y AXIS VRDY OFF

    Bit of a general alarm you need to check amplifiers

  3. #3
    Join Date
    Apr 2017
    Posts
    28

    Re: 401 SERVO ALARM : Y AXIS VRDY OFF

    yes, check amplifiers but also these diagnostics help:
    The details of servo alarm are displayed in the diagnosis display (No.

    200, 201, 204) as shown below.

    #7 #6 #5 #4 #3 #2 #1 #0

    200 OVL LV OVC HCA HVA DCA FBA OFA

    #7 (OVL) : An overload alarm is being generated.

    #6 (LV) : A low voltage alarm is being generated in servo amp.

    #5 (OVC) : A overcurrent alarm is being generated inside of

    digital servo.

    #4 (HCA) : An abnormal current alarm is being generated in

    servo amp.

    #3 (HVA) : An overvoltage alarm is being generated in servo

    amp.

    #2 (DCA) : A regenerative discharge circuit alarm is being

    generated in servo amp.

    #1 (FBA) : A disconnection alarm is being generated.

    #0 (OFA) : An overflow alarm is being generated inside of digital

    servo.

    #7 #6 #5 #4 #3 #2 #1 #0

    201 ALD EXP

    When OVL equal 1 in diagnostic data No.200 :

    #7 (ALD) 0 : Motor overheating

    1 : Amplifier overheating

    When FBAL equal 1 in diagnostic data No.200 :

    ALD EXP Alarm details

    1 0 Built–in pulse coder disconnection (hardware)

    1 1 Separately installed pulse coder disconnection

    (hardware)

    0 0 Pulse coder is not connected due to software.

  4. #4
    Join Date
    Feb 2022
    Posts
    1

    Re: 401 SERVO ALARM : Y AXIS VRDY OFF

    It's a general warning that amplifiers should be checked.
    fall guys

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