LNS Quick Load Servo 80 - Alarm definitions and causes

CHAPTER 1: ALARMS
QUICK LOAD SERVO 65/80
1-29
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.