LNS QUICK SIX - Page 41

1-38 Chapter 1: Alarms
QUICK SIX
CAUTION
• When any alarm has occurred, eliminate its cause, ensure safety, then reset the alarm, and
restart operation. Otherwise, injury may occur.
• If an absolute position erase alarm (AL.25) occurred, always make home position setting again.
Otherwise, misoperation may occur.
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 control circuit
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 (RES).
For details, refer to Alarms and warning list.
Alarm definitions and causes
When an alarm occurs, the trouble (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. The optional servo configuration
software may be used to refer to the cause.
Display Name Definition Cause Action
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. Power was restored after the
bus voltage had dropped to
200VDC. (Main circuit power
switched on within 5s after it had
switched off.)
Review the power supply.
AL.10 Undervoltage Power supply
voltage dropped.
MR-J2S- CP:160V
or less
MR-J2S- CP1:83V
or less
5. Faulty parts in the servo
amplifier
Checking method
Alarm (AL.10) occurs if power is
switched on after disconnection of
all cables but the control circuit
power supply cables.
Change the servo amplifier.
AL.12 Memory error 1 RAM, memory fault
AL.13 Clock error Printed board fault
AL.15 Memory error 2 EEP-ROM fault
Faulty parts in the servo amplifier
Checking method
Alarm (any of AL.11 to 13 and 15)
occurs if power is switched on
after disconnection of all cables
but the control circuit power
supply cables.
Change the servo amplifier.
1. Encode connector (CN2)
disconnected.
Connect correctly.
2. Encoder fault Change the servo motor.
3. Encoder cable faulty
(wire breakage or short)
Repair or change the cable.
AL.16 Encoder error 1 Communication
error occurred
between encoder
and servo amplifier.
4. Wrong combination of servo
amplifier and servo motor
Use correct combination.