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4-14
j
Error Diagnosis by Means of Alarm Display (Parameter Unit)
Alarm
display
Error content
Condition when error oc-
curred
Probable cause
Countermeasures
a
.
02
Parameter cor-
ruption
Occurred when power was
turned on.
Internal memory error
Replace Servo Driver.
a
.
04
Parameter set-
ting error
Occurred when power was
turned on.
A user parameter was set to
a value outside of the set-
ting range previously.
Change the user parameter
setting so it is within the set-
ting range.
Control board defective.
Replace Servo Driver.
a
.
10
Overcurrent
Occurred when power was
turned on.
Control board defective.
Replace Servo Driver.
Occurred when Servo was
turned on.
•
Current feedback circuit
error
•
Main circuit transistor
module error
Replace Servo Driver.
Servomotor power line is
short-circuited or grounded.
•
Correct the power line
short-circuiting or ground-
ing.
•
Measure the insulation re-
sistance at the Servomo-
tor itself. If there is short-
circuiting, replace the Ser-
vomotor.
There is faulty wiring at the
U, V, or W phase, or the
GR.
Correct the wiring.
Servomotor coil are dam-
aged.
Measure the winding resis-
tance. If the coil are dam-
aged, replace the Servomo-
tor.
Overheating
Occurred during operation.
Occurred even though pow-
er was on.
If
t i
t d ft
The ambient temperature
for the Servo Driver is high-
er than 50
°
C.
Bring the ambient tempera-
ture for the Servo Driver
down to 50
°
C or lower.
If reset is executed after
waiting for a time, operation
resumes.
The load torque is too high.
•
Lighten the load.
•
Lengthen the acceleration
time.
•
Select another Servomo-
tor.
a
.
31
Deviation count-
er overflow
Occurred when Servomotor
did not operate even when
command pulse train was
i
t
Servomotor power lines or
encoder lines are wired in-
correctly.
Correct the wiring.
input.
The Servomotor is mechani-
cally locked.
Unlock the Servomotor
shaft.
Occurred at high-speed op-
eration.
Servomotor power lines or
encoder lines are wired in-
correctly.
Correct the wiring.
Occurred when a long com-
mand pulse was given.
The gain adjustment is
insufficient.
Adjust the gain.
g
The acceleration/decelera-
tion times are too extreme.
Lengthen the
acceleration/deceleration
time.
The load is too large.
•
Lighten the load.
•
Select another Servomo-
tor.
Application
Chapter 4
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