6.7 Auto-Tuning Fault Detection
YASKAWA ELECTRIC SIEP C710616 27G YASKAWA AC Drive A1000 Technical Manual 363
Digital Operator Display Error Name
Er-21 Z Pulse Correction Error
Cause Possible Solutions
Motor was coasting when Auto-Tuning was
performed.
Make sure the motor has stopped completely. Repeat Auto-Tuning.
Either the motor or the PG encoder on the motor is
not properly wired.
Check the wiring for the motor and the PG encoder. Repeat Auto-Tuning.
The direction for the PG encoder is set incorrectly, or
the number of pulses set for the PG encoder is
wrong.
Check the direction and number of pulses set for the PG encoder. Repeat Auto-Tuning.
PG encoder is damaged. Check the signal output from the PG encoder attached to the motor. Replace the PG if damaged.
Motor inertia is large. Increase the setting of n8-02 (Pole Attraction Current).
Z-Pulse Offset Tuning was performed when b1-04
was set to 1.
• Z-Pulse Offset Tuning cannot be performed for a m
achine in which reverse operation is prohibited.
• If the machine allows reverse operation, set b1-04 to 0 to enable
Reverse Operation Selection and then perform the Z-Pulse Offset
Tuning.
Motor vibrates during tuning.
• Increase the setting of n8-03, Current Start
up Time, and n8-04, Pole Attraction Time.
• Decrease the setting of n8-02, Pole Attraction Current.
Digital Operator Display Error Name
Er-25
High Frequency In
jection Parameter Tuning Error
Cause Possible Solutions
Motor data was incorrect.
Perform Stati
onary Auto-Tuning and then perform High Frequency Injection Parameter Tuning again. If the problem continues, high
frequency injection control might not be possible with that motor.
Note: Auto-Tuning is not applicable for SPM motors.
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