Remedies For Alarms - Mitsubishi Electric EZMOTION MR-E Super MR-E-10A-QW003 Instruction Manual

10. TROUBLESHOOTING

10.2.2 Remedies for alarms

CAUTION
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When an alarm occurs, the trouble signal (ALM) switches off and the dynamic brake is operated to stop the
servo motor. At this time, the display indicates the alarm No.
The servo motor comes to a stop. Remove the cause of the alarm in accordance with this section. Use the
optional MR Configurator (servo configuration software) to refer to the cause of the alarm.
Display
AL.10 Undervoltage
AL.12 Memory error 1
AL.13 Clock error
AL.15 Memory error 2
AL.16 Encoder error 1 Communication error
AL.17 Board error
AL.19 Memory error 3
When any alarm has occurred, eliminate its cause, ensure safety, then reset the
alarm, and restart operation. Otherwise, injury may occur.
As soon as an alarm occurs, turn off Servo-on (SON) and power off the power
supply.
POINT
When any of the following alarms has occurred, always remove its cause and
allow about 30 minutes for cooling before resuming operation. If operation is
resumed by switching power off, then on to reset the alarm, the servo amplifier
and servo motor may become faulty.
Regenerative error (AL.30)
Overload 1 (AL.50)
Overload 2 (AL.51)
The alarm can be deactivated by switching power off, then on press the "SET"
button on the current alarm screen or by turning on the reset signal (RES). For
details, refer to section 10.2.1.
Name Definition
Power supply
voltage dropped to
160VAC or less.
RAM, memory fault
Printed board fault
EEP-ROM fault
occurred between
encoder and servo
amplifier.
CPU/parts fault
The output terminals
U, V, W of the servo
amplifier and the
input terminals U, V,
W of the servo motor
are not connected.
ROM memory fault
Cause
1. Power supply voltage is low.
2. There was an instantaneous control
power failure of 60ms or longer.
3. Shortage of power supply capacity
caused the power supply voltage to
drop at start, etc.
4. The bus voltage dropped to
200VDC.
5. Faulty parts in the servo amplifier
Faulty parts in the servo amplifier
1. Faulty parts in the servo amplifier
2. The number of write times to EEP-
ROM exceeded 100,000.
1. Encoder connector (CN2)
disconnected.
2. Encoder fault
3. Encoder cable faulty
(Wire breakage or shorted)
1. Faulty parts in the servo amplifier
2. The wiring of U, V, W is
disconnected or not connected.
Faulty parts in the servo amplifier
10 - 6
Action
Check the power supply.
Change the servo amplifier.
Change the servo amplifier.
Change the servo amplifier.
Connect correctly.
Change the servo motor.
Repair or change cable.
Change the servo amplifier.
Correctly connect the output terminals U, V,
W of the servo amplifier and the input
terminals U, V, W of the servo motor.
Change the servo amplifier.