
2.ALARM NUMBERS AND BRIEF DESCRIPTIONS TROUBLESHOOTING B-65395EN/01
- 200 -
No. LED display Description Countermeasure
−
An error was detected in the control
circuit.
Turn the power off then back on. If this
alarm recurs, replace the servo
amplifier module.
−
A alarm for the servo amplifier
module is issued. (General illegal
instruction)
Turn the power off then back on. If this
alarm recurs, replace the servo
amplifier module.
−
A alarm for the servo amplifier
module is issued. (Slot illegal
instruction)
Turn the power off then back on. If this
alarm recurs, replace the servo
amplifier module.
−
A alarm for the servo amplifier
module is issued. (CPU address
error)
Turn the power off then back on. If this
alarm recurs, replace the servo
amplifier module.
−
A alarm for the servo amplifier
module is issued. (DTC address
error)
Turn the power off then back on. If this
alarm recurs, replace the servo
amplifier module.
−
Stuck overflow occurred.
Turn the power off then back on. If this
alarm recurs, replace the servo
amplifier module.
−
Stuck underflow occurred.
Turn the power off then back on. If this
alarm recurs, replace the servo
amplifier module.
I/O link alarm
No. LED display Description Countermeasure
−
A FANUC I/O Link error occurred.
Some unit connected to the line was
turned off.
Turn off the power to all units
connected to the line. Then, turn on
the slave devices, followed by the
master device.
No LED display
No. LED display Description Countermeasure
−
No indicators
lit
The control circuit is not operating
normally.
(1) Check the 24-VDC control supply
voltage. If the voltage is low,
increase the voltage to an
appropriate level.
(2) Check whether a fuse in the
servo amplifier module has
blown.
If a blown fuse is found, replace
it, following the procedure
described in Part IV
"Maintenance of Servo Amplifier
Unit."
If (1) and (2) are not the cause,
replace the servo amplifier.