Pid Output Fault - YASKAWA A1000 Technical Manual

 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.
 Insufficient Starting Torque
Cause
Auto-Tuning has not yet been performed (required for vector
control modes).
The control mode was changed after performing Auto-Tuning.
Only Stationary Auto-Tuning was performed.
 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.
 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.
Motor runs at following speed.
b2-01  Motor speed < E1-09
 Buzzing Sound from Motor at 2 kHz
Cause
Exceeded 110% of the rated output current of the drive while
operating at low speeds.
YASKAWA ELECTRIC SIEP C710616 27G YASKAWA AC Drive A1000 Technical Manual
6.10 Troubleshooting without Fault Display
• 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 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 167 for details.
Perform Auto-Tuning. Refer to Motor Performance Fine-Tuning on page
Perform Auto-Tuning again.
Perform Rotational Auto-Tuning.
• Adjust the DC Injection braking settings.
• Increase the current level for DC Injection Braking (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  d2-01 / 100
• Reduce the load.
• Adjust the Stall Prevention level during acceleration (L3-02).
Set b1-21 (Start Condition Selection at Closed Loop Vector Control) to 1.
Set E1-09 (Minimum Output Frequency) to a value lower than the setting for b2-01 (DC Injection Braking Start
Frequency).
• 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.
Possible Solutions
Possible Solutions
326.
Possible Solutions
Possible Solutions
Possible Solutions
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