
3.SPECIFICATIONS FANUC AC SERVO AMPLIFIER β series B-65232EN/03
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3.3 PROTECTION AND ABNORMALITY DETECTION
FUNCTIONS
The servo amplifier is provided with the protection and abnormality
detection functions indicated below.
Determine any alarm status from the diagnostic data displayed by the
controller.
- Converter: main circuit overload
- Converter: control power supply undervoltage alarm
- Converter: DC link undervoltage alarm
- Inverter: Abnormal current alarm
- Converter: DC link undervoltage alarm
- Converter: excessive deceleration power alarm
- Converter: cooling fan stopped alarm
- FSSB disconnection alarm
When an alarm is issued, the LED "ALM" is turned on with the FSSB
interface and PWM interface, and a 7-segment indicator is turned on
with the I/O Link interface. For details of the 7-segment interface,
refer to "FANUC SERVO MOTOR β series I/O Link Option
Maintenance Manual".
FSSB interface PWM interface State Description
Alarm
Check the details of the alarm with diagnostic data
on the controller.
Light
POWER
READY
ALM
Light
LINK
POWER
READY
ALM