Omron OMNUC R88D-WT15HF User Manual page 423

Troubleshooting
Display Display Alarm code
ALO1
ON ON
OFF OFF
OFF OFF
ON OFF
ON ON
ON ON
ON ON
ON ON
ON ON
OFF OFF
OFF OFF
OFF OFF
OFF OFF
OFF OFF
OFF OFF
OFF OFF
OFF OFF
OFF OFF
ON OFF
ON OFF
ON OFF
ON OFF
ON OFF
ON OFF
ON ON
5-6
Error detection Error detection
ALO2 ALO3
OFF Main-circuit power
supply setting error
(See note 3.)
ON Overvoltage
ON Low voltage
ON Overspeed
ON Overload
ON Overload
ON Dynamic brake over-
load
ON Inrush resistance
overload
ON Overheat
OFF Backup error (ABS)
OFF Checksum error
(ABS)
OFF Battery error (ABS)
OFF Absolute error
OFF Overspeed error
(ABS)
OFF Encoder overheating
(ABS)
OFF Speed command in-
put reading error
OFF Torque command in-
put reading error
OFF System error
ON Runaway detected.
ON Multi-turn data error
(ABS)
ON Encoder communica-
tions error
ON Encoder parameter
error
ON Encoder data error
ON Multi-turn limit dis-
crepancy
OFF Deviation counter
overflow
function function
The setting of Pn001.2 (AC/DC input selec-
tion) and the AC/DC wiring method of the
main circuit power supply are not the same.
Main circuit DC voltage above the allowable
range.
Main circuit DC voltage below the allowable
range.
Servomotor rotation speed exceeded the
maximum speed.
Output torque exceeded 245% of rated
torque.
Output torque continued at 120% to 245%
of rated torque.
Regenerative energy exceeded the dynam-
ic brake resistance during dynamic brake
operation.
Inrush current exceeded the inrush resis-
tance during power supply inrush.
Abnormal temperature rise detected in radi-
ation shield.
Encoder backup power supply dropped.
Checksum error for encoder memory data.
Encoder battery voltage dropped (to 2.7 V
or lower).
Encoder internal data error
Servomotor rotation speed exceeded 200 r/
min when encoder power was turned ON.
Abnormal encoder temperature rise de-
tected.
The A/D end signal was not output from the
A/D converter within a fixed time.
The A/D end signal was not output from the
A/D converter within a fixed time.
A control circuit system error was detected.
The Servomotor rotated in the opposite
direction from the command.
Absolute encoder setup was incorrect.
No communication between encoder and
Servo Driver.
Encoder parameters are corrupted.
Data from the encoder is corrupted.
The multi-turn limits for the encoder and the
Servo Driver do not conform.
Deviation counter's residual pulses exceed-
ed the deviation counter overflow level set
in Pn505.
Chapter 5
Cause of error Cause of error