Sanyo Denki SANMOTION 3E S, Инструкция по эксплуатации

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8.3 Trouble shooting when alarm activated
8-28
8
Maintenance
■
Alarm Code 88 (External Absolute Encoder Communication Error)
 Encoder serial signal time out
 Serial communication data 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
■ Defect in internal circuit of external
encoder.
■
Replace the external encoder.
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
■ External encoder wiring has
abnormalities.
■ Check the wiring conditions and correct it
if improper.
4
■
External encoder power supply voltage
reduction.
■
Confirm that the external encoder power
supply voltage is above 4.75 V, and
correct it if improper.
■
Alarm Code 89 (External Encoder Initial Process Error)
 Abnormality in initial process of absolute encoder
Status at the time of alarm
Cause
1 2 3 4
Issued during operation. ✔ ✔ ✔ ✔
 Corrective actions
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 encoder power supply
voltage at the motor side 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 external
encoder.
■
Replace the external encoder.