Sanyo Denki Sanmotion R 3E S, Instruction Manual, Page: 356 / 514

8. Maintenance
8-23
[Use of EN2 with motor encoder in the semi-closed system]
 Corrective actions
[Use of EN2 with external encoder]
 Corrective actions
Status at the time of alarm
Cause
1 2 3 4
Issued when control power is turned ON.
✔ ✔ ✔ ✔
Issued during operation. ✔ ✔ ✔
Cause Investigation and corrective actions
1
■
For motor encoder wiring:
 Improper wiring.
 Connector is removed.

Loose connection.
 Encoder cable is too long.
 Encoder cable is too thin.
■
Check the wiring conditions and
correct it if improper.
■
Confirm that the encoder power
supply voltage at the motor side is
above 4.75 V, correct it if improper.
2
■
Servo amplifier and motor encoder
are not combined properly.
■
Replace with servo motor equipped
with proper encoder.
3
■
Defect in internal circuit of servo
amplifier.
■
Replace the servo amplifier.
4
■
Defect in internal circuit of motor
encoder.
■
Replace the servo motor.
Status at the time of alarm
Cause
1 2 3 4
Issued when control power is turned ON.
✔ ✔ ✔ ✔
Issued during operation.
✔ ✔ ✔
Cause Investigation and corrective actions
1
■
For external encoder wiring,
 Improper wiring.
 Connector is removed.
 Loose connection.
 Encoder cable is too long.
 Encoder cable is too thin.
■
Check the wiring conditions and
correct it if improper.
■
Confirm that the power supply
voltage for the external encoder is
above 4.75 V, and correct it if
improper.
2
■
Turn-on timing of external encoder
power is delayed.
■
Confirm that the power supply
voltage for the external encoder
soon after turning on control power,
and bring forward the timing of
turning on the power for external
encoder if it is not established.
3
■
Defect in internal circuit of servo
amplifier.
■
Replace the servo amplifier.
4
■
Defect in internal circuit of motor
encoder.
■
Replace the servo motor.