Omron R88M-W User Manual

5-6
Display Cause of errorError detection
function
Alarm codeDisplay Cause of errorError detection
function
ALO3ALO2ALO1
ON ON OFF Main-circuit power
supply setting error
(See note 3.)
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.
OFF OFF ON Overvoltage Main circuit DC voltage above the allowable
range.
OFF OFF ON Low voltage Main circuit DC voltage below the allowable
range.
ON OFF ON Overspeed Servomotor rotation speed exceeded the
maximum speed.
ON ON ON Overload Output torque exceeded 245% of rated
torque.
ON ON ON Overload Output torque continued at 120% to 245%
of rated torque.
ON ON ON Dynamic brake over-
load
Regenerative energy exceeded the dynam-
ic brake resistance during dynamic brake
operation.
ON ON ON Inrush resistance
overload
Inrush current exceeded the inrush resis-
tance during power supply inrush.
ON ON ON Overheat Abnormal temperature rise detected in radi-
ation shield.
OFF OFF OFF Backup error (ABS) Encoder backup power supply dropped.
OFF OFF OFF Checksum error
(ABS)
Checksum error for encoder memory data.
OFF OFF OFF Battery error (ABS) Encoder battery voltage dropped (to 2.7 V
or lower).
OFF OFF OFF Absolute error Encoder internal data error
OFF OFF OFF Overspeed error
(ABS)
Servomotor rotation speed exceeded 200 r/
min when encoder power was turned ON.
OFF OFF OFF Encoder overheating
(ABS)
Abnormal encoder temperature rise de-
tected.
OFF OFF OFF Speed command in-
put reading error
The A/D end signal was not output from the
A/D converter within a fixed time.
OFF OFF OFF Torque command in-
put reading error
The A/D end signal was not output from the
A/D converter within a fixed time.
OFF OFF OFF System error A control circuit system error was detected.
ON OFF ON Runaway detected. The Servomotor rotated in the opposite
direction from the command.
ON OFF ON Multi-turn data error
(ABS)
Absolute encoder setup was incorrect.
ON OFF ON Encoder communica-
tions error
No communication between encoder and
Servo Driver.
ON OFF ON Encoder parameter
error
Encoder parameters are corrupted.
ON OFF ON Encoder data error Data from the encoder is corrupted.
ON OFF ON Multi-turn limit dis-
crepancy
The multi-turn limits for the encoder and the
Servo Driver do not conform.
ON ON OFF Deviation counter
overflow
Deviation counter’s residual pulses exceed-
ed the deviation counter overflow level set
in Pn505.
Troubleshooting Chapter 5

Omron R88M-W Specifications

General

Brand	Omron
Model	R88M-W
Category	Servo Drives
Language	English