Alarms
−30−
8 Alarms
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 Alarms
If a protective function is activated and an alarm generates, the motor will coast to a stop.
At the same time, the alarm output is turned OFF, and the ALARM 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 lists
Motor overheat
Motor poor connection
●
The motor abnormally produced heat from any cause,
and a built-in overheat protection device (thermal
protector) of the motor was activated (OPEN).
●
The motor power line of the motor cable occurred
disconnection or poor connection.
Decrease the load.
Improve the operation conditions such
as the acceleration time or deceleration
time.
Check the motor cable or connection of
the 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.
●
The rate generator lead wire of the motor cable
occurred disconnection or poor connection.
●
The capacitor was not connected or occurred poor
connection.
Decrease the load.
Check the connections of 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
●
The control DC power supply was turned o while the
data setting or initialization was executed.
●
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 is restarted, contact
your nearest Oriental Motor sales oce.
Prevention of operation
at power-on
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
The EXT-ERROR input was turned OFF. Check the EXT-ERROR input.
This alarm cannot be reset by the ALARM-RESET input.
If the "prevention of operation at power-on alarm" parameter is set to disable, this alarm will not generate. (Initial setting: Enable)
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 specied 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 a 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.
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