Alarms - Omron OMNUC W Series User Manual

Troubleshooting
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
Alarm code
Display p y
ALO1
OFF
OFF
OFF
OFF
ON
ON
ON
ON
OFF
5-6
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Error detection
f function
ALO2 ALO3
OFF OFF Parameter corruption
OFF OFF Main circuit detection
error
OFF OFF Parameter setting er-
ror
OFF OFF Motor mismatch
OFF OFF Overcurrent or radi-
ation shield error
ON OFF Regeneration error
ON OFF Regeneration over-
load
ON OFF Main circuit Power
Supply setting
OFF ON Overvoltage
Cause of error
The checksum for the parameters read
from the EEP-ROM does not match.
There is an error in the detection data for
the power supply circuit.
Incorrect parameter setting.
The Servomotor does not match the Servo
Driver.
Overcurrent detected, or improper radiation
shield temperature rise detected. (1.5 to
3 kW only).
Regeneration resistor or Regeneration cir-
cuit damaged due to large amount of re-
generative energy.
Regenerative energy exceeded the regen-
eration resistance.
The AC/DC wiring method from the main
circuit power supply is different from the
Pn001.2 parameter setting.
Main circuit DC voltage above the allowable
range.
Chapter 5