Unstable Motor Speed When Using Pm; Motor Does Not Restart After Power Loss - YASKAWA AC Drive-A1000 Technical Manual

u

Unstable Motor Speed when Using PM

Cause
The motor code for the PM motor (E5-01 or T2-02) is
set incorrectly (Yaskawa motors only).
Drive is attempting to operate the motor beyond the
speed control range listed in the specifications.
Motor hunting occurs.
Hunting occurs at start.
Too much current is flowing through the drive.
u

Motor Does Not Restart after Power Loss

Cause
The Run command was not issued again when power
was restored.
The relay that is supposed to maintain the Run
command has been switched off.
YASKAWA ELECTRIC SIEP C710616 31B YASKAWA AC Drive – A1000 Technical Manual
Refer to Motor Performance Fine-Tuning on page 290
Check the speed control range and adjust the speed accordingly.
Refer to Motor Performance Fine-Tuning on page 290
Increase the S-curve time at the start of acceleration (C2-01).
• Enter the correct motor code for the PM motor being used into E5-01.
• For special-purpose motors, enter the correct data to all E5 parameters according to the test
report provided for the motor.
• Check the sequence and wiring that has been set up to enter the Run command.
• A relay should be set up to make sure the Run command remains enabled throughout any power
loss.
Check wiring and circuitry for the relay intended to keep the Run command enabled.
6.10 Troubleshooting without Fault Display
Possible Solutions
for details.
for details.
Possible Solutions
6
343