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Alarms
16 Alarms
This driver has the alarm function to protect from temperature rise, poor connection, error in operation, and others. If an
alarm is generated, the ALM-A output is turned ON (in the case of normally open), or the ALM-B output is turned OFF (in
the case of normally closed).
At the same time, the motor stops, and the PWR/ALM LED blinks in red.
The generated alarm content can be checked by counting the number of times the LED blinks or by using the
MEXE02
or RS-485 communication.
16.1 Alarm reset
Before resetting an alarm by one of the following methods, be sure to remove the cause of the alarm and ensure safety.
•
Turn the ALM-RST input ON. (The alarm will be reset at the ON edge of the input.)
•
Turn on the power again.
•
Execute the alarm reset using the
MEXE02
.
•
Execute the alarm reset by the maintenance command via RS-485 communication.
Note
•
Some alarms cannot be reset with other than turning on the power again.
Refer to "16.3 Generation condition of alarms" on the next page.
•
Continuing the operation without removing the cause of the alarm may cause damage to equipment.
•
Perform the ALM-RST input after the motor (gearhead) output shaft is stopped completely.
Turn the operation input signal OFF, and remove the cause of the alarm before resetting the alarm.
The alarm reset is disabled while the operation input signal is being ON. Operation cannot be performed until the alarm
is reset.
ALM-A output
ALM-RST input
START/STOP input
RUN/BRAKE input
Mot
or movement
ON
OFF
ON
OFF
ON
OFF
2 ms or more
CW
Stop
∗
Alarm generation
ON
OFF
ON
10 ms or less
2 ms or more
*
If an alarm is generated while the motor rotates, the motor will coast to a stop.
If the RS-485 communication error or the RS-485 communication timeout alarm is generated, the motor will decelerate to stop.
If the external stop alarm is generated, the motor will stop instantaneously.
The stopping method when an alarm is generated varies depending on the alarm type.
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