LNS QUICK SIX - Page 42

Chapter 1: Alarms
QUICK SIX
1-39
Display Name Definition Cause Action
AL.17 Board error CPU/parts fault
AL.19 Memory error 3 ROM memory fault
Faulty parts in the servo amplifier
Checking method
Alarm (A.17 or A.18) occurs if
power is switched on after
disconnection of all cables but the
control circuit power supply
cables.
Change the servo amplifier.
AL.1A Motor
combination
error
Wrong combination
of servo amplifier
and servo motor.
Wrong combination of servo
amplifier and servo motor
connected.
Use correct combination.
1. Encoder connector (CN2)
disconnected.
Connect correctly.
2. Encoder fault Change the servo motor.
AL.20 Encoder error 2 Communication
error occurred
between encoder
and servo amplifier.
3. Encoder cable faulty(wire
breakage or shorted)
Repair or change the cable.
1. Power input wires and servo
motor output wires are in contact
at main circuit terminal block
(TE1).
Connect correctly.
2. Sheathes of servo motor power
cables deteriorated, resulting in
ground fault.
Change the cable.
AL.24 Main circuit
error
Ground fault
occurred at the
servomotor outputs
(U, V and W
phases) of the
servo amplifier.
3. Main circuit of servo amplifier
failed.
Checking method
AL.24 occurs if the servo is
switched on after disconnecting
the U, V, and W power cables
from the servo amplifier.
Change the servo amplifier.
1. Reduced voltage of super
capacitor in encoder
After leaving the alarm occurring for a
few minutes, switch power off, then on
again. Always make home position
setting again.
2. Battery voltage low
Absolute position
data in error
3. Battery cable or battery is
faulty.
Change battery.
Always make home position setting
again.
AL.25 Absolute
position erase
Power was
switched on for the
first time in the
absolute position
detection system.
4. Super capacitor of the absolute
position encoder is not charged
After leaving the alarm occurring for a
few minutes, switch power off, then on
again. Always make home position
setting again.
1. Wrong setting of parameter No.
0
Set correctly.
2. Built-in regenerative brake
resistor or regenerative brake
option is not connected.
Connect correctly
3. High-duty operation or
continuous regenerative operation
caused the permissible
regenerative power of the
regenerative brake option to be
exceeded.
Checking method
Call the status display and check
the regenerative load ratio.
1. Reduce the frequency of positioning.
2. Use the regenerative brake option of
larger capacity.
3. Reduce the load.
Review power supply 4. Power supply voltage is
abnormal. MR-J2S- CP:260V or
more
MR-J2S- CP1:135V or more
Change servo amplifier or regenerative
brake option.
Permissible
regenerative power
of the built-in
regenerative brake
resistor or
regenerative brake
option is exceeded.
5. Built-in regenerative brake
resistor or regenerative brake
option faulty.
AL.30 Regenerative
alarm
Regenerative
transistor fault
6. Regenerative transistor faulty.
Checking method
1) The regenerative brake option
has overheated abnormally.
2) The alarm occurs even after
removal of the built-in
regenerative brake resistor or
regenerative brake option.
Change the servo amplifier.