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Answered SRVO-156 Error

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Bailey Chapman

Hello,

i'm struggling with a Fanuc M-710i Robot with an R-J3 Controller. Currently i am facing SRVO-156 Error. Acc. to manual i should disconnect CRR-88 which i can't find even after checking the entire enclosure and the label on every single connector. I think my manual isn't the right one.

If someone has the proper procedure to resolve this error or could tell me where to get the manual, would be greatly appreciated.

Thanks for any help!

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    Sarwat Anjum
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    Hi There!

    Here's what the manual says:

    SRVO-156 SVAL1 IPMAL alarm (Group : i Axis : j)

    (Explanation):  Abnormally high current flowed through the main circuit of the servo amplifier.

    (Action 1): Detach the motor power lines from the respective terminals on the servo amplifier, and switch on the power, then check to see if the alarm occurs again. If the alarm occurs, replace the servo amplifier.
    (Action 2): Detach the motor power lines from the respective terminals on the servo amplifier, and check for isolation between each motor power line (U, V, or W) and a ground potential (GND). If a motor power line is short-circuited to a ground, the motor, robot connection cable, or robot internal cable is likely to be defective. Check each of them, and replace it if necessary.
    (Action 3): Detach the motor power lines from the respective terminals on the servo amplifier, and check the resistance between each motor power line pair (U and V, V and W, or W and U) using a meter that is capable of measuring a very low resistance. If the measured three resistances are different, the motor, robot connection cable, or robot internal cable is likely be defective. Check each of them, and replace it if necessary

    Hope this helps!

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