NSK M-EGA-15A2301, User Manual

Page: 208 / 237

8.Maintenance Trouble shooting when alarm occurs
8-18
■
Alarm Code 85 (Encoder Initial Process Error)
Status at the time of alarm
Cause
1 2 3
Issued when power supply control is turned ON.
✔ ✔ ✔
◆
Corrective actions
Cause Investigation and corrective actions
1
■
For converter wiring:
◆ Improper wiring.
◆
Connector is removed.
◆
Loose connection.
■
Check wiring and replace if necessary.
2
■
Driver internal circuit failure
■
Replace the driver.
3
■
Defect in internal circuit of converter.
■
Replace the converter.
■
Alarm Code A0 (Serial Encoder Internal Error 0)
Status at the time of alarm
Cause
1 2
Issued when power supply control is turned ON.
✔ ✔
Issued during operation.
✔ ✔
◆
Corrective actions
Cause Investigation and corrective actions
1
■
Defect in internal circuit of converter.
■
Turn ON the power supplies again; if
not restored, replace the converter.
2
■
Malfunction due to noise.
■
Confirm proper grounding of the driver.
■
Add ferrite core or similar
countermeasures against noise.
■
Alarm Code A2 (Serial Encoder Internal Error 2)
Status at the time of alarm
Cause
1 2 3
Issued while stopping the motor.
✔ ✔
Issued while rotating the motor.
✔ ✔ ✔
◆
Corrective actions
Cause Investigation and corrective actions
1
■
Defect in internal circuit of converter.
■
Turn ON the power supplies again; if
not restored, replace the converter.
2
■
Malfunction due to noise.
■
Confirm proper grounding of the driver.
■
Add ferrite core or similar
countermeasures against noise.
3
■
The acceleration of motor rotation
exceeds the permitted acceleration.
■
Check the operation condition, and
extend the acceleration and declaration
time.