![YASKAWA U1000 Series Скачать руководство пользователя страница 388](http://html.mh-extra.com/html/yaskawa/u1000-series/u1000-series_technical-manual_907114388.webp)
6.10 Troubleshooting without Fault Display
388
YASKAWA ELECTRIC
SIEP C710636 02B YASKAWA U1000 Technical Manual
◆
Connected Machinery Vibrates When Motor Rotates
■
Unexpected Noise from Connected Machinery
Note:
To inspect for a motor error, set C6-02 to a value between 1 and 4 and check the motor.
■
Oscillation or Hunting
◆
PID Output Fault
◆
Insufficient Starting Torque
◆
Motor Rotates After the Drive Output is Shut Off (Motor Rotates During DC Injection
Braking)
Cause
Possible Solutions
The carrier frequency is at the resonant frequency of the connected
machinery.
Adjust the carrier frequency using parameters C6-02 through C6-05.
The drive output frequency is the same as the resonant frequency
of the connected machinery.
• 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.
Cause
Possible Solutions
Insufficient tuning.
Perform Auto-Tuning.
Refer to
Motor Performance Fine-Tuning on page 344
Gain is too low when using PID control.
Refer to
for details.
The frequency reference is assigned to an external source and the
signal is noisy.
• 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 filter time constant (H3-13).
The cable between the drive and motor is too long.
• Perform Auto-Tuning.
• Reduce the length of the cable.
Cause
Possible Solutions
No PID feedback input.
• 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.
The level of detection and the target value do not correspond with
each other.
• 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 and H3-11 to adjust PID target and feedback signal scaling.
Reverse drive output frequency and speed detection. When output
frequency rises, the sensor detects a speed decrease.
Set PID output for reverse characteristics (b5-09 = 1).
Adjustment made to PID parameter settings are insufficient.
Refer to
for details.
Cause
Possible Solutions
Auto-Tuning has not yet been performed (required for vector
control modes).
Motor Performance Fine-Tuning on page 344
The control mode was changed after performing Auto-Tuning.
Perform Auto-Tuning again.
Only Stationary Auto-Tuning was performed.
Perform Rotational Auto-Tuning.
Cause
Possible Solutions
DC Injection Braking is set too low and the drive cannot decelerate
properly.
• Adjust the DC Injection braking settings.
• Increase the current level for DC Injection Braking Current (b2-02).
• Increase the DC Injection Braking time at stop (b2-04).
The stopping method is set so that the drive coasts to stop.
Set b1-03 (Stopping Method Selection) to 0 or 2.
SIEP_C710636_02B_1_0.book 388 ページ 2015年11月25日 水曜日 午後4時56分