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8. Maintenance and Inspection
8-4
8.2.2
Servo Drive
If an alarm triggers, the malfunction signal output contact (ALARM) is turned off and the
dynamic brake stops the motor.
Alarm
Code
Name
Details
What to inspect
IPM Fault
Overcurrent (H/W)
Check for incorrect drive output wiring /
incorrect encoder wiring.
Check the motor ID / drive ID / encoder setting.
Check for equipment clash or confinement.
IPM temperature
IPM module overheat
Check for incorrect drive output wiring and
incorrect encoder wiring.
Check the motor ID, drive ID, and encoder
setting.
Check for equipment clash or confinement.
Overcurrent Overcurrent
(S/W)
Check for incorrect drive output wiring and
incorrect encoder wiring.
Check the motor ID, drive ID, and encoder
setting.
Check for equipment clash or confinement.
Current offset
Abnormal current offset
Replace the drive if [St-23] and [St-24] are 10%
or higher of the rated current.
Overcurrent (/CL)
Overcurrent (H/W)
Check for incorrect drive output wiring and
incorrect encoder wiring.
Check the motor ID, drive ID, and encoder
setting.
Check for equipment clash or confinement.
Continuous overload
Continuous overload
Check for equipment clash or confinement.
Check load and brake condition.
Check for incorrect drive output wiring and
incorrect encoder wiring.
Check the motor ID, drive ID, and encoder
setting.
Room temperature
Drive overheat
Check the temperature inside the drive [St-19].
Install a cooling fan and check load.
Regen. Overload
Regenerative overload
Check input voltage, regenerative braking
resistance, and wiring.
Replace the drive.
Motor cable open
Motor cable disconnection
Motor wiring
Encoder comm.
Serial encoder
communication error
Check for incorrect wiring of the serial encoder
cable.
Encoder cable open
Encoder cable
disconnection
Check whether the encoder cable is
disconnected.
Encoder data error
Encoder data error
Check the [P0-02] setting and encoder wiring.
Motor setting error
Motor ID setting error
Check the [P0-00] setting.
Encoder Z PHASE Open
Encoder Z PHASE cable
broken
Check the encoder cable
Low Battery Error
Low voltage error
BackUp battery has not enough voltage,
Change battery.
※
After replacing battery, Power “ON” and
Homing operation are
absolutely needed
(apply from S/W Ver 1.28)