NSK M-EGA-15A2301, User Manual

Page: 210 / 237

8.Maintenance Trouble shooting when alarm activated
8-20
■
Alarm Code C1 (Over-speed)
Status at the time of alarm
Cause
1 2 3 4
Issued when command is entered after Servo ON.
✔ ✔
Issued when the motor is started.
✔ ✔
Issued other than operating and starting the motor.
✔ ✔
◆
Corrective actions
Cause Investigation and corrective actions
1
■
Defect in internal circuit of driver.
■
Replace the driver.
2
■
Defect in internal circuit of converter.
■
Replace the converter
3
■
Excessive overshoot while starting.
■
Adjust the servo parameters.
■
Simplify the acceleration and declaration
command pattern.
■
Reduce the load inertia moment.
4
■
Wiring of U/V/W -phase between
driver and motor do not match.
■
Check the wiring and repair any
irregularities.
■
Alarm Code C2 (Velocity Control Error)
Status at the time of alarm
Cause
1 2 3
Issued while due to input of Servo ON.
✔ ✔
Issued if command is entered.
✔ ✔
Issued while starting and stopping the motor.
✔
◆
Corrective actions
Cause Investigation and corrective actions
1
■
Wiring of U/V/W -phase between
driver and motor do not match.
■
Check the wiring and repair any
irregularities.
3
■
The motor is vibrating (oscillating).
■
Adjust the servo parameters so that
motor will not vibrate (oscillate).
4
■
Excessive overshoot and
undershoot.
■
Monitor speed with the analog monitor.
■
Adjust the servo parameters to reduce
overshoot and undershoot.
■
Simplify the acceleration and declaration
command pattern.
■
Mask the alarm.
✔
For the velocity control error alarm, an alarm may occur while starting and stopping when load inertia
moment is excessive. For this reason, in the gravitational axis applications,
“
Do not detect
“
is selected
as the standard setting. If its detection is needed, consult our representatives.