Instruction manual
9.
TROUBLESHOOTING
9.2.2 Remedies for alarms
When any alarm has occurred, eliminate its cause, ensure safety, then reset the
ACAUTIoN
alarm, and restart operation. Otherwise, injury may occur.
POINT
I
When any of the following alarms has occurred, always remove its cause and
allow about 15 minutes for cooling before resuming operation. If operation is
resumed by switchmg control circuit power
off,
then on
to
reset the alarm,
the servo ampmer and servo motor may become faulty.
*
Overload
1
(A.
50)
*
Overload
2
(A.
51)
on
the reset signal
(RES).
For detads, refer
to
Section
9.2.1.
The alarm can be deactivated by switchmg power
off,
then on
or
by turning
When an alarm occurs, the trouble signal
(ALM)
switches
off
and the dynamic brake is operated
to
stop the
servomotor.
At
ths time, the &splay in&cates the
alarm
No.
The servo motor comes
to
a stop. Remove the cause of the alarm
in
accordance with
ths
section. The
optional Servo Configuration Software may be used
to
refer
to
the cause.
Dtsplay
Review the power supply.
1.
Power supply voltage is low.
Power supply
Undervoltage
L
10
Action
Cause
Definition
Name
voltage dropped
to
15ms
or
longer.
20V
or less
2.
Power failed instantaneously for
3.
Shortage of power supply capacity
caused the power supply voltage
to
drop at start, etc.
4.
Power switched on within
5s
after
it had switched
off.
5.
Faulty parts in the servo amplifier (Change the servo amplifier.
Checking method
Alarm
(10)
occurs
if
power
is
switched
on
after
connectors
CN1.4.
CNlB,
CNP2, CNF'3
are &connected.
Checking method
fault
Alarm
(any
of
11
to
13
and
15)
after connectors
CNLA,
CNlB,
CNF'B,
CW3
are
hconnected.
Change the servo amplifier
,.
16
Connect correctly.
1.
CNPZ connector disconnected.
Communication
Encoder error
1
error occurred
(Encoder wiring broken or shorted)
and servo amplifier.
Repair or change cable.
3.
Motor cable faulty
between encoder
Change the servo
motor.
2.
Encoder fault
9-
7