4-19
Alarm
display
Countermeasures
Probable cause
Condition when error oc-
curred
Error content
a
.
70
a
.
71
a 72
Overload
Occurred during operation.
Operating at more than
120% of the rated torque.
(A.70)
HA/LA/V/W Models
•
If the Servomotor shaft is
locked, unlock it.
•
If Servomotor power lines
a
.
72
Operating at more than
135% of the rated torque.
(A.71)
H/L Models
If Servomotor ower lines
are incorrectly wired, cor-
rect them.
•
Lighten the load.
Operating at 120% to 135%
of the rated torque.
(A.72)
H/L Models
•
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.80
Encoder error
Occurred when the power
was turned on.
Cn-01 bit no. E is set to “1.”
Set Cn-01 bit No. E to “0.”
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.
Occurred when the power
was turned on.
Cn-01 bit no. E is set to “1.”
Set Cn-01 bit No. E to “0.”
a
.
c3
Encoder A, B
phase wire dis-
connection.
Some movement occurred
at the beginning of opera-
tion.
•
Encoder lines discon-
nected.
•
Connector contact faulty.
•
Correct any disconnected
lines.
•
Insert connectors correct-
ly.
Encoder lines wired incor-
rectly.
Correct the wiring.
Encoder defective.
Replace the Servomotor.
Servo Driver defective.
Replace Servo Driver.
Occurred when the power
was turned on.
Cn-01 bit no. E is set to “1.”
Set Cn-01 bit No. E to “0.”
a
.
c4
Encoder S
phase wire dis-
connection.
Some movement occurred
at the beginning of opera-
tion.
•
Encoder lines discon-
nected.
•
Connector contact faulty.
•
Correct any disconnected
lines.
•
Insert connectors correct-
ly.
Encoder lines wired incor-
rectly.
Correct the wiring.
Encoder defective.
Replace the Servomotor.
Servo Driver defective.
Replace Servo Driver.
Occurred when the power
was turned on.
Cn-01 bit no. E is set to “1.”
Set Cn-01 bit No. E to “0.”
a
.
f3
Momentary
power failure
alarm
•
A momentary power fail-
ure occurred.
•
The power supply was re-
started within the power
retention period.
•
Reset and then run again.
•
Set Cn-01 bit no. 5 to “1”
to automatically clear the
alarm when the power is
restored after a momen-
tary power failure.
Application
Chapter 4
