Specifications

8
8. TROUBLESHOOTING
8– 5
8-1-3 Torque control mode
No. Start-Up Sequence Fault Investigation Possible Cause Refer To
1 Power on • LED is not lit.
• LED flickers.
Not improved if connectors
CN1A, CN1B and CN2 are
disconnected.
1) Power supply voltage
fault
2) Servo amplifier faulty.
Improved when connectors
CN1A and CN1B are
disconnected.
Power supply of CN1
cabling is shorted.
Improved when connector
CN2 is disconnected.
1) Power supply of encoder
cabling is shorted.
2) Encoder is faulty.
Alarm occurs. Refer to Section 8-2 and remove cause.
Alarm occurs. Refer to Section 8-2 and remove cause.2 Switch on servo-on
signal.
Section 8-2
Section 8-2
Servo motor does
not rotate.
Call the status display
and check the analog
torque command.
3 Switch on forward
rotation start (RS1)
or reverse rotation
start (RS2).
Section 2-3-2Analog torque command
is 0V.
Call the external I/O signal
display and check the
ON/OFF status of the input
signal.
Check the internal speed
limits 1 to 3
(parameters No. 8 to 10).
RS1 or RS2 is off.
Set value is 0.
Check the internal torque
limit 1 (parameter No. 28).
Set value is 0.
(1), Section 2-3-3
(3), Section 2-3-5