Alarm Occurrence Timing Chart - Mitsubishi Electric EZMOTION MR-E Super MR-E-10A-QW003 Instruction Manual

3. SIGNALS AND WIRING

3.5 Alarm occurrence timing chart

CAUTION
When an alarm occurs in the servo amplifier, the base circuit is shut off and the servo motor is coated to a
stop. Switch off the power supply in the external sequence. To reset the alarm, switch the power supply from
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off to on, press the "SET" button on the current alarm screen, or turn the reset (RES) from off to on. However,
the alarm cannot be reset unless its cause is removed.
(Note)
Power supply
Base circuit
Dynamic brake
Servo-on
(SON)
Ready
(RD)
Trouble
(ALM)
Reset
(RES)
Note. Shut off the power as soon as an alarm occurs.
(1) Overcurrent, overload 1 or overload 2
If operation is repeated by switching power off, then on to reset the overcurrent (AL.32), overload 1
(AL.50) or overload 2 (AL.51) alarm after its occurrence, without removing its cause, the servo
amplifier and servo motor may become faulty due to temperature rise. Securely remove the cause of
the alarm and also allow about 30 minutes for cooling before resuming operation.
(2) Regenerative error
If operation is repeated by switching power off, then on to reset the regenerative (AL.30) alarm after
its occurrence, the external regenerative resistor will generate heat, resulting in an accident.
(3) Instantaneous power failure
Undervoltage (AL.10) occurs when the input power is in either of the following statuses.
A power failure of the control circuit power supply continues for 60ms or longer and the control
circuit is not completely off.
The bus voltage dropped to 200VDC.
(4) In position control mode (incremental)
When an alarm occurs, the home position is lost. When resuming operation after deactivating the
alarm, make a home position return.
When an alarm has occurred, remove its cause, make sure that the operation
signal is not being input, ensure safety, and reset the alarm before restarting
operation.
As soon as an alarm occurs, turn off Servo-on (SON) and power off the power
supply.
ON
OFF
ON
OFF
Valid
Invalid
ON
OFF
ON
OFF
ON
OFF
2s
ON
OFF
Alarm occurs.
Remove cause of trouble.
Brake operation
50ms or more
3 - 28
Power off
Power on
Brake operation
60ms or more