Oriental motor BLHM450K Series - BLH Alarm Lists and Causes

25
Alarms
10.3 Alarm lists
Number of times
PWR/ALM LED
blinks
Alarm name Cause Remedial action
Reset using
the ALM-RST
input
Two times Overload
A load exceeding the rated
torque was applied to the
motor for a time set in the
"Overload alarm detection time"
parameter or more.
*
•
Decrease a load.
•
Reconsider operating conditions such as
the acceleration time and deceleration
time.
•
If the alarm is generated at a low
temperature, warm up.
Possible
Three times
Sensor error
The sensor line in the motor
cable was disconnected. Or the
motor cable was come o.
Check the connection between the driver
and motor.
Sensor error
at power-on
The sensor line in the motor
cable was disconnected. Or the
driver power supply was turned
on in a state where the motor
cable was come o.
Four times Overvoltage
•
The internal voltage of the
driver exceeded 38 VDC.
•
A large inertial load was
suddenly stopped.
•
Check the power supply voltage.
•
If the alarm is generated during
operation, decrease a load or increase
the deceleration time.
•
If the motor is rotated by external force,
reconsider how to use or environment.
Five times Undervoltage
The internal voltage of the
driver dropped below 18 VDC.
•
Check the power supply voltage.
•
Check the wiring of the power supply
cable.
Six times Overspeed
The motor rotation speed was
exceeded 5200 r/min.
•
Decrease a load.
•
Reconsider operating conditions such as
the acceleration time and deceleration
time.
•
If the motor is rotated by external force,
reconsider how to use or environment.
Seven times Overcurrent
Excessive current was own
through the driver due to
ground fault, etc.
Turn o the power, and turn on the power
again after checking if the product is not
damaged.
If the alarm is not cleared, contact your
nearest Oriental Motor sales oce.
Not possible
Eight times EEPROM error
The data stored in the driver
was damaged.
Initialize the parameters, and turn on the
power again.
Nine times
Main circuit
overheat
The internal temperature of the
driver exceeded 85 °C (185 °F).
•
Reconsider the ambient temperature.
•
Reconsider the ventilation condition.
•
Reconsider the operating condition.
Possible
10 times External stop
•
The EXT-ERROR input signal
was turned OFF.
•
External stop was executed
using the
MEXE02
.
Check the EXT-ERROR input signal.
11 times
Prevention of
operation at
power-on
The power supply was turned
on in a state where the
"Prevention of operation at
power-on alarm" parameter
was set to "enable" and the
operation input signal was
being ON.
Before supplying power to the driver, turn
the operation input signal OFF.
Lit CPU error
The CPU is not operated
properly.
Turn on the power again.
If the alarm is not cleared, contact your
nearest Oriental Motor sales oce.
Not possible
*
The setting can be changed using the "Overload alarm detection time" parameter. Refer to the USER MANUAL for details.