YASKAWA A1000 HHP Programming Manual page 221

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.
YASKAWA ELECTRIC SIEP YEAHHP 01B YASKAWA AC Drive – A1000 HHP Programming Manual
Z Pulse Correction Error
Make sure the motor has stopped completely. Restart 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.
2.7 Auto-Tuning Fault Detection
Error Name
Possible Solutions
2
221