8. MAINTENANCE
8 - 7
Alarm Status
Segment LED
Display
Alarm Code
ALM8,4,2,1
Abbreviation
Alarm
Name
Alarm
Clear
Contents
0110 OS Over
speed
Possible Rotating speed of servomotor exceeded
allowable speed (1.2 times maximum
rotating speed) during operation.
Alarm code 0,1 indicates: when Func2/ bit7,6 =”0,0”, “0”= output open and “1”= output short.
Operating state when alarm occurred
POSSIBLE CAUSES
OPERATING STATE
1 2 3 4 5
When control power supply is turned on
○ △
Upon command input after Servo ON
△ ○
○
When motor is started
○ ○
During operation (except when motor is started)
○ ○
Corrective Measures
CAUSES CORRECTIVE MEASURES
1 Faulty amplifier control board Replace servo amplifier.
2 Faulty servomotor sensor Replace servomotor
3 Overshoot is too large during motor start. Use the analog monitor of the remote controller to
check the velocity.
→ If over shoot is too large, adjust the servo
parameter
→ Change the acceleration/deceleration speed
pattern command
→ Reducing the load inertia.
4 Incorrect wiring of U, V, W phases between
amplifier and motor
Check and correct wiring.
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