5-6
5-2
Alarms
If the Servo Driver detects an error, ALM (alarm output) and ALO1 to ALO3 (alarm
codes) are output, the power drive circuit in the Servo Driver turns OFF, and the alarm is
displayed. If the Servo Driver detects a warning (e.g., overload warning or regenerative
overload warning), WARN (warning output) and ALO1 to ALO3 (warning codes) are out-
put, and the warning is displayed. (Operation continues.)
Note 1.
Warning outputs and warning codes are output only if the parameters have been set
(Pn50F.3, Pn001.1).
Note 2.
Refer to
5-3-1 Error Diagnosis Using Alarm Display
for appropriate alarm countermeasures.
Note 3.
Cancel the alarm using one of the following methods.
S
Input a RESET (alarm reset) signal.
S
Turn OFF the power supply, then turn it ON again.
S
Press the
RESET
Key on the Parameter Unit, or press the
Up
and
Down
Keys together on the
front panel. The following alarms can only be cancelled by turning OFF the power supply, then
turning it ON again, however: A.02, A.04, A.10, A.81, A.82, A.84, A.C9, and A.Cb.
Note 4.
If you cancel an alarm while RUN is turned ON, the Servo Driver will start as soon as the alarm
is cleared, which is dangerous. Be sure to turn OFF the RUN command before cancelling the
alarm. If the RUN command is ON, or the servo is always ON (setting Pn50A.1 = 7), first check
safety sufficiently before cancelling the alarm.
H
Alarm Table
Display
Alarm code
Error detection
f
Cause of error
p y
ALO1
ALO2
ALO3
function
OFF
OFF
OFF
Parameter corruption
The checksum for the parameters read
from the EEP-ROM does not match.
OFF
OFF
OFF
Main circuit detection
error
There is an error in the detection data for
the power supply circuit.
OFF
OFF
OFF
Parameter setting er-
ror
Incorrect parameter setting.
OFF
OFF
OFF
Motor mismatch
The Servomotor does not match the Servo
Driver.
ON
OFF
OFF
Overcurrent or radi-
ation shield error
Overcurrent detected, or improper radiation
shield temperature rise detected. (1.5 to
3 kW only).
ON
ON
OFF
Regeneration error
Regeneration resistor or Regeneration cir-
cuit damaged due to large amount of re-
generative energy.
ON
ON
OFF
Regeneration over-
load
Regenerative energy exceeded the regen-
eration resistance.
ON
ON
OFF
Main circuit Power
Supply setting
The AC/DC wiring method from the main
circuit power supply is different from the
Pn001.2 parameter setting.
OFF
OFF
ON
Overvoltage
Main circuit DC voltage above the allowable
range.
Troubleshooting
Chapter 5
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