Sanyo Denki SANMOTION 3E S, Instruction Manual, Page: 301 / 488

8.3 Trouble shooting when alarm activated
8-30
8
Maintenance
■
Alarm Code A1 (Absolute Encoder Internal Error 1)
 Encoder internal error
Status at the time of alarm
Cause
1 2 3 4
Issued when control power is turned ON.
✔ ✔
Issued during operation.
✔ ✔
 Corrective actions
Cause Investigation and corrective actions
1
■
Loose connection of battery cable.
■
Check the battery connector of encoder
cable attachment.
2
■
Battery voltage reduction.
■
Check the voltage of battery.
3
■ Loose connection of encoder connector.
■
Check the wiring conditions and correct it
if improper.
4
■ Defect in internal circuit of motor
encoder.
■ Turn ON the power supplies again, if not
corrected, replace the servo motor.
* “ Encoder clear and alarm reset methods“ vary depending on the motor encoder in use.
Please refer to "8.4 Encoder Clear and Alarm Reset Methods".
■
Alarm Code A2 (Absolute Encoder Internal Error 2)
 Encoder internal error
Status at the time of alarm
Cause
1 2 3
Issued while stopping the servo motor.
✔ ✔
Issued while rotating the servo motor.
✔ ✔ ✔
 Corrective actions
Cause Investigation and corrective actions
1
■
Defect in internal circuit of motor
encoder.
■
Turn ON the power supplies again, if not
corrected, replace the servo motor.
2
■ Malfunction due to noise
■ Confirm proper grounding of the
amplifier.
■ Check the shielding of the encoder cable.
■
Add ferrite core or similar
countermeasures to against noise.
3
■
Motor rotation speed exceeds the
permitted velocity.
■
Check the operation condition and
reduce the maximum rotation speed.
*
“
Encoder clear and alarm reset methods“ vary depending on the motor encoder in use.
Please refer to "8.4 Encoder Clear and Alarm Reset Methods".