Instruction manual
9.
TROUBLESHOOTING
9.
TROUBLESHOOTING
9.1 Trouble at Start-up
I
1
/i\CAUTIoN
make operation instable.
Excessive adjustment or change
of
parameter setting must not be made as
it
will
POINT
I
Using
the optional Servo Configuration
software,
you can refer
to
unrotated
servo
motor
reasons,
etc.
The following
faults
may occur at start-up. If any of such
faults
occurs, take the correspondmg action.
9.1.1 Position control mode
(1)
Troubleshooting
-
No.
1
-
3
-
Start-up
Sequence
Power on
Swltch on servo-on
slgnal.
Enter input
command.
(Test operation)
Fault
'
LED
is
not
lit.
'
LED flickers.
Alarm occurs.
Alarm occurs.
Servo
motor
shaft is
not servo-locked
(is free).
Servo motor does
not rotate.
Investigation
Possible
Cause
Not improved
if
connectors
cabling is shorted.
CNP2 is disconnected.
1.
Power supply of encoder
Improved when connector
disconnected.
is shorted.
CNlA and CNlB are
Power supply of CNPl cabling
Improved when connectors
3.
CNPl connection fault
dmonnected.
2.
Servo
amplifier is faulty. CNlA, CNlB and CNP2 are
1.
Power supply voltage fault
2. Encoder is faulty.
Refer
to
Section 9.2 and remove cause.
Refer
to
Section 9.2 and rem
Check the display
to
see if
the servo amplifier is ready
to operate.
Check cumulative command
pulses.
e cause.
1.
Servo on signal is not input.
(Wiring mistake)
2.
24VDC power is not
supplied to COM.
1.
Wiring mistake
(a) For open collector pulse
train input, 24VDC
power
is
not supplied to
OPC.
(b)
LSPLSN-SG are not
connected.
2.
No pulses
is
input.
\
Refer
To
Section 9.2
Section 9.2
Section
6.3
Section 6.2
9- 1