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dv4
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Inversion Prevention Detection
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An external force on the load side rotated the motor.
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Make sure that the motor is rotating in the correct direction.
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Find and repair problems on the load side that cause the motor to rotate from the load side.
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Disable detection of this fault for applications that rotate the motor from the load side in the opposite direction of the speed reference. The drive will not detect this fault if F1-19 = 0 [Deviation 4 Detection Selection = Disabled].
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E5-11 [Encoder Z-Pulse Offset] is set incorrectly.
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Correctly set the value for Δθ to E5-11 as specified by the values on the motor nameplate.
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There is a new encoder or the motor rotation direction changed.
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Do Z Pulse Offset Tuning.
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Noise interference along the encoder cable.
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Correctly ground the shielded wire of the encoder cable.
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The encoder cable is disconnected or wired incorrectly.
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Examine for wiring errors or disconnected wires in the encoder cable, and repair problems.
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The drive incorrectly detected the motor magnetic pole position.
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If the value for U6-57 [PolePolarityDeterVal] is lower than 819, increase the value set in n8-84 [Polarity Detection Current]. Consult the motor manufacturer for information about maximum setting values.
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The setting of n8-84 [Polarity Detection Current] is too low.
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Increase the n8-84 setting from the default. Consult the motor manufacturer for information about maximum setting values.
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Pole Position Detection failed.
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If you are using an IPM motor, do High Frequency Injection Auto-Tuning.
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The PG option card or the encoder on the motor side is damaged.
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Repair the wiring and re-energize the drive, then replace the PG option card or the PG if the problem continues.
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