Pid Output Fault; Insufficient Starting Torque; Motor Rotates After The Drive Output Is Shut Off (Motor Rotates During Dc Injection Braking); Output Frequency Is Not As High As Frequency Reference - YASKAWA P1000 Technical Manual

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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.
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Insufficient Starting Torque

Cause
Auto-Tuning has not yet been performed.
Only Stationary Auto-Tuning was performed.
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Motor Rotates after the Drive Output is Shut Off (Motor Rotates During DC Injection
Braking)
Cause
DC Injection Braking is set too low and the drive
cannot decelerate properly.
The stopping method is set so that the drive coasts to
stop.
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Output Frequency is Not as High as Frequency Reference

Cause
Frequency reference is set within the range of the Jump
Frequency.
Upper limit for the frequency reference has been
exceeded.
Large load triggered Stall Prevention function during
acceleration.
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Sound from Motor

Cause
Exceeded 110% of the rated output current of the drive
while operating at low speeds.
YASKAWA SIEP YAIP1U 01C AC Drive - P1000 Technical Manual
• 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 160
Perform Auto-Tuning. Refer to Motor Performance Fine-Tuning on page
Perform Rotational Auto-Tuning.
• 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).
Set b1-03 (Stopping Method Selection) to 0 or 2.
• Adjust the parameters used for the Jump Frequency function (d3-01, d3-02, d3-03).
• Enabling the Jump Frequency prevents the drive from outputting the frequencies specified in
the Jump range.
• Set the maximum output frequency and the upper limit for the frequency reference to more
appropriate values (E1-04, d2-01).
• The following calculation yields the upper value for the output frequency:
E1-04 x d2-01 / 100
• Reduce the load.
• Adjust the Stall Prevention level during acceleration (L3-02).
• If the output current rises too high at low speeds, the carrier frequency is automatically reduced
and causes a whining or buzzing sound.
• If the sound is coming from the motor, disable carrier frequency derating (L8-38 = 0).
• Disabling the automatic carrier frequency derating increases the chances of an overload fault
(oL2). Switch to a larger capacity motor if oL2 faults occur too frequently.
6.10 Troubleshooting without Fault Display
Possible Solutions
for details.
Possible Solutions
Possible Solutions
Possible Solutions
Possible Solutions
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