K/iK Series AC Servo Driver
136
Alarm
Alarm contents
Circumstance
Cause
Treatment measures
abnormal
supply is on
Encoder failure
Replace servo motor
Servo drive circuit board develops fault
Replace the servo drive
During operation
Wiring of encoder is wrong
Correct wiring of encoder
Encoder cables are interfered due to different
specifications
Change cable specifications to
stranded wire or stranded
shielded wire with core wire
over 0.12 mm
2
and stranded
wire made of tined soft copper
Encoder cables are interfered due to overlength
The max. wiring distance
should be 20 m.
Signal lines are interfered due to engaging-in
and damage in sheath of encoder cables
Correct layout of encoder
cables
Encoder cables are bound with high current
line or their distance is too close
Lay encoder cables at places
free from surge voltage
Change in FG potential due to influence by
motor side equipment (welding machine, etc.)
Connect equipment ground wire
to prevent shunting to FG at PG
side
Signal line of encoder is interfered
Take anti-interference measures
for encoder wiring.
Encoder failure
Replace servo motor
Servo drive circuit board develops fault
Replace the servo drive
□41
Bus
encoder
overspeed
When control power
supply is on
Servo motor rotates at a speed of over 100
r/min when PG power is on
PG power is set ON when servo
rotating speed is less than 100
r/min
Encoder failure
Replace servo motor
Servo drive circuit board develops fault
Replace the servo drive
During operation
Encoder failure
Replace servo motor
Servo drive circuit board develops fault
Replace the servo drive
□42
Bus encoder FS status
is wrong
Normally
during
operation
Encoder failure
Replace servo motor
Servo drive circuit board develops fault
Replace the servo drive
□43
Bus encoder counter
goes wrong
Normally
during
operation
Servo drive circuit board develops fault
Replace the servo drive
□44
Checkout
in
bus
encoder control field
is wrong
When control power
supply is on or during
operation
Encoder cables are interfered due to different
specifications
Change cable specifications to
stranded wire or stranded
shielded wire with core wire
over 12 mm
2
and stranded wire
made of tined soft copper
Encoder cables are interfered due to overlength
The max. wiring distance
should be 20 m.
Signal lines are interfered due to engaging-in
and damage in sheath of encoder cables
Correct layout of encoder
cables
Encoder cables are bound with high current
Lay encoder cables at places