Oriental motor DSC Series - Alarms and Warnings; Alarm List and Codes

Alarm
−32−
8 Alarm
The speed controller provides alarms that are designed to protect the speed controller from overheating, poor
connection, error in operation, etc. (protective functions), as well as warnings that are output before the corresponding
alarms generate (warning functions).
8.1 Alarm
If a protective function is activated and an alarm is generated, the motor will coast to a stop.
At the same time, the alarm output is turned OFF, and the ALRM LED will be lit (red) in addition that the alarm code
is shown on the display. The alarm type can be checked by the alarm code.

Alarm list
•
Motor overheat
•
Motor poor connection
•
The motor abnormally produced heat
by some reason and a built-in overheat
protection device (thermal protector) of
the motor was activated (OPEN).
•
Disconnection or improper connection
of the motor power line of the motor
cable.
•
Reduce the load.
•
Improve the operation condition
such as the acceleration time or
deceleration time.
•
Check the motor cable or
connection of connector part.
•
Motor lock
•
Motor poor connection
•
The motor output shaft was locked
more than the time set in the "motor
lock detection time" parameter.
•
Disconnection or improper connection
of the rate generator lead wire of the
motor cable.
•
A capacitor is not connected, or it is
poor connection.
•
Reduce the load.
•
Check connections for the motor
cable, connector part, and
capacitor.
Overspeed
The rotation speed of the motor output
shaft exceeded approximately
2300 r/min.
Check whether the motor is rotated
by a load or external force.
EEPROM error
*1
•
The control DC power supply was
turned off while executing the data
setting or initialization.
•
The stored data was damaged.
•
Data became no longer writable or
readable.
•
Initialize the data and parameters.
•
If the alarm cannot be cleared even
when the power has been cycled,
contact your nearest Oriental Motor
sales ofce.
Prevention of operation
at power-on
*2
The power supply was turned on while
the FWD input or REV input was being
ON.
If the FWD input or REV input which
has been turned ON is turned OFF,
the alarm will be reset.
External stop
*3
The EXT-ERROR input turned OFF. Check the EXT-ERROR input.
*1
This alarm cannot be reset by the ALARM-RESET input.
*2
If the "prevention of operation at power-on alarm" parameter is set to disable, this alarm will not generate. (Initial setting: Enable)
*3
Only when the EXT-ERROR is assigned.
•
"Motor overheat" alarm
Motors with an output power of 15 W to 90 W contain an automatic return type thermal protector in the motor windings.
If the motor internal temperature exceeds the specied value, the thermal protector will be activated (OPEN) and the
"motor overheat" alarm will be generated. If the TH-OUT output is assigned to the output signal, the status (OPEN/
CLOSE) of the built-in thermal protector can be detected. Motors with an output power of 6 W are adopted impedance
protection for overheat protection so that the temperature will not rise above certain level.
•
"Overspeed" alarm
This product is equipped a function to suppress the generation of the "overspeed" alarm.
If the rotation speed of the motor output shaft is exceeded approximately 2100 r/min, the brake current is automatically
owed to decelerate the motor.