YASKAWA A1000 Series Quick Start Manual page 210

5.5 Auto-Tuning Fault Detection
Digital Operator Display
Er-21
Cause
Motor was coasting when Auto-Tuning
was performed.
Either the motor or the PG encoder on the
motor are 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.
210
Z Pulse Correction Error
Make sure the motor comes to a complete stop. Repeat Auto-Tuning.
Check the wiring for the motor and the PG encoder. Restart Auto-Tuning.
Check the direction and number of pulses set for the PG encoder. Restart 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 with reverse operation prohibited.
• If the machine allows reverse operation, set b1-04 to 0 to enable Reverse Operation Selection and then
perform 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.
YASKAWA ELECTRIC TOEP C710616 41G YASKAWA AC Drive - A1000 Quick Start Guide
Error Name
Possible Solutions
Error Name
Possible Solutions