No. LED display Description Countermeasure
A DC link low voltage alarm is issued. This alarm is issued when the DC voltage of
the main circuit power is too low.
414
(1) 190 ms or longer may pass from the time when both the *ESP of the built-in DI and the
*ESP of the I/O link interface signal are canceled until the external magnetic contactor
inserted into the input for motive power turns on(including the operating time of the magnetic
contactor). The magnetic contactor must turn on within 100 ms.
(2) The external circuit breaker may be turned off. Check the circuit breaker.
(3) The supply voltage for dynamic power is lower than the rated value. Check the voltage. If
the voltage is too low, increase it to an appropriate level.
(4) The external magnetic contactor may not be connected properly. Check the connection.
If (1) to (4) are not the cause of the alarm, replace the servo amplifier unit.
417
A parameter has been specified incorrectly.
Check the following parameters:
No.30: Is the specified motor type correct?
No.31: Is the specified direction of rotation of
the motor correct?
No.106: Is the denominator of the number of
pulses per single revolution of the motor 0?
No.180: Is the specified reference counter
capacity 0 or a negative value?
418
A DO alarm is issued. Replace the servo amplifier unit.
423
The specified speed exceeds 32767000
detection units per second.
Re-examine the CMR and speed settings.
The cooling fan has stopped. This alarm is issued when the fan motor built
into the servo amplifier unit has failed.
The fan motor is consumable.
425
(1) Check that the fan is not clogged with something.
(2) Check that the power connector of the fan is connected properly.
(3) Replace the fan or servo amplifier unit.
446
The external pulse input line is disconnected. Connect the external pulse input signal
correctly.
447
The velocity deviation is too high (velocity
control)
Check the actual velocity.
See the settings of parameter No. 136.
O
vertravel alarms
No. LED display Description Countermeasure
500
The positive stroke limit has been exceeded.
501
The negative stroke limit has been exceeded.
Check whether *+OT and *-OT are connected
correctly. Check whether a correct move
command is specified. Move the tool in the
opposite direction in jog mode, then perform a
reset.
510
The positive soft stroke limit has been
exceeded.
511
The negative soft stroke limit has been
exceeded.
Check whether appropriate values have been
specified for parameters No.142 and 143.
Check whether a valid move command is
specified. Move the tool in the opposite
direction in jog mode, then perform a reset.
EDIT
DATE DISIGNE
DESCRIPTION
TITLE
DRAW
ALARM FOR FANUC SERVO MOTOR β series I/O Link OPTION (FANUC Series
16i/18i/21i/20i/160i/180i/210i– MODEL A MAINTENANCE MANUAL),(FANUC Series
16i/160i/160is/18i/180i/180is/21i/210i/210is – MODEL B MAINTENANCE MANUAL)
B-63005EN/02-2, B-63525EN/02-1
SHEET
7/8
APPROV.
FANUC LTD