Ground Fault Circuit Interrupter (Gfci) Trips During Run; Connected Machinery Vibrates When Motor Rotates; Pid Output Fault - YASKAWA U1000 Technical Manual

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Ground Fault Circuit Interrupter (GFCI) Trips During Run

Cause
Excessive leakage current trips GFCI.
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Connected Machinery Vibrates When Motor Rotates

n Unexpected Noise from Connected Machinery
Cause
The carrier frequency is at the resonant frequency of
the connected machinery.
The drive output frequency is the same as the resonant
frequency of the connected machinery.
Note: Set C6-02 to a value between 1 and 4 and check the motor to inspect for a motor error.
n Oscillation or Hunting
Cause
Insufficient tuning.
Gain is too low when using PID control.
The frequency reference is assigned to an external
source and the signal is noisy.
The cable between the drive and motor is too long.
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PID Output Fault

Cause
No PID feedback input.
The level of detection and the target value do not
correspond with each other.
Reverse drive output frequency and speed detection.
When output frequency rises, the sensor detects a
speed decrease.
Adjustment made to PID parameter settings are
insufficient.
YASKAWA ELECTRIC SIEP C710636 04D U1000 Industrial MATRIX Drive Technical Manual
• Check the wiring and rating of peripheral devices.
• Increase the GFCI sensitivity or use GFCI with a higher threshold.
• Lower the carrier frequency (C6-02).
• Reduce the length of the cable used between the drive and the motor.
• Disable the internal EMC filter.
Adjust the carrier frequency using parameters C6-02 through C6-05.
• Adjust the parameters used for the Jump Frequency function (d3-01 through d3-04) to skip the
problem-causing bandwidth.
• Place the motor on a rubber pad to reduce vibration.
Perform Auto-Tuning.
Refer to Motor Performance Fine-Tuning on page
Refer to b5: PID Control on page 206
• Ensure that noise is not affecting the signal lines.
• Separate main circuit wiring and control circuit wiring.
• Use twisted-pair cables or shielded wiring for the control circuit.
• Increase the analog input time filter constant (H3-13).
• Perform Auto-Tuning.
• Reduce the length of the cable.
• Check the multi-function analog input terminal settings.
• Set multi-function analog input terminal A1, A2, or A3 for PID feedback (H3-02, H3-10, or
H3-06 = B).
• A signal input to the terminal selection for PID feedback is needed.
• Check the connection of the feedback signal.
• Check the various PID-related parameter settings.
• No PID feedback input to the terminal causes the value detected to be 0, causing a PID fault
and the drive to operate at max frequency.
• PID control keeps the difference between target and detection values at 0. Set the input level
for the values relative to one another.
• Use analog input gains H3-03, H3-07, and H3-11 to adjust PID target and feedback signal
scaling.
Set PID output for reverse characteristics (b5-09 = 1).
Refer to b5: PID Control on page 206
6.10 Troubleshooting without Fault Display
Possible Solutions
Possible Solutions
Possible Solutions
356.
for details.
Possible Solutions
for details.
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