4-15
Alarm
display
Countermeasures
Probable cause
Condition when error oc-
curred
Error content
a
.
40
Overvoltage
Occurred when power was
turned on.
The power supply voltage is
outside of the allowable
range.
•
The supply voltage must
be 170 to 253 VAC when
200 VAC is specified.
•
The supply voltage must
be 85 to 127 VAC when
100 VAC is specified.
Occurred during Servomo-
tor deceleration.
The load inertia is too large.
•
Lengthen the deceleration
time.
•
Reset the motor.
The power supply voltage is
outside of the allowable
range.
•
The supply voltage must
be 170 to 253 VAC when
200 VAC is specified.
•
The supply voltage must
be 85 to 127 VAC when
100 VAC is specified.
Regeneration Unit error
Replace the Regeneration
Unit
Occurred while lowering
(vertical shaft)
Gravity torque is too large.
•
Add a counterbalance to
the machine, and reduce
the gravity torque.
•
Reduce the lowering
speed.
•
Connect a Regeneration
Unit.
a
.
51
Over speed
High-speed rotation oc-
curred when command was
input.
The rotational speed ex-
ceeded 4,950 r/min due to
overshooting.
•
Adjust the gain.
•
Lower the maximum
speed of the command.
Encoder is wired incorrectly.
Correct the wiring.
a
.
70
Overload
Occurred during operation.
Operating at more than
120% of the rated torque.
•
If the Servomotor shaft is
locked, unlock it.
•
If Servomotor power lines
are incorrectly wired, cor-
rect them.
•
Lighten the load.
•
Lengthen the acceleration
time.
•
Adjust the gain.
Power supply voltage
dropped.
•
The supply voltage must
be 170 to 253 VAC when
200 VAC is specified.
•
The supply voltage must
be 85 to 127 VAC when
100 VAC is specified.
a
.
c1
Runaway de-
tected
Some movement occurred
at the beginning of opera-
tion.
•
Encoder lines wired incor-
rectly.
•
Servomotor power lines
wired incorrectly.
Correct the wiring.
a
.
c2
Phase error de-
tected
Some movement occurred
at the beginning of opera-
tion.
•
Encoder lines discon-
nected.
•
Connector contact faulty.
•
Correct the wiring.
•
Insert the connectors cor-
rectly.
Application
Chapter 4
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