YASKAWA A1000 Technical Manual page 363

Digital Operator Display
Er-21
Cause
Motor was coasting when Auto-Tuning was
performed.
Either the motor or the PG encoder on the motor is
not properly wired.
The direction for the PG encoder is set incorrectly, or
the number of pulses set for the PG encoder is
wrong.
PG encoder is damaged.
Motor inertia is large.
Z-Pulse Offset Tuning was performed when b1-04
was set to 1.
Motor vibrates during tuning.
Digital Operator Display
Er-25
Cause
Motor data was incorrect.
YASKAWA ELECTRIC SIEP C710616 27G YASKAWA AC Drive A1000 Technical Manual
Z Pulse Correction Error
Make sure the motor has stopped completely. Repeat Auto-Tuning.
Check the wiring for the motor and the PG encoder. Repeat Auto-Tuning.
Check the direction and number of pulses set for the PG encoder. Repeat Auto-Tuning.
Check the signal output from the PG encoder attached to the motor. Replace the PG if damaged.
Increase the setting of n8-02 (Pole Attraction Current).
• Z-Pulse Offset Tuning cannot be performed for a machine 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.
• Increase the setting of n8-03, Current Startup Time, and n8-04, Pole Attraction Time.
• Decrease the setting of n8-02, Pole Attraction Current.
High Frequency Injection Parameter Tuning Error
Perform Stationary 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.
6.7 Auto-Tuning Fault Detection
Error Name
Possible Solutions
Error Name
Possible Solutions
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