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4-16
Alarm
display
Countermeasures
Probable cause
Condition when error oc-
curred
Error content
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.
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.
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.
cpf00
Parameter Unit
transmission er-
ror 1
Occurred when power was
turned on.
Servo Driver defective.
Replace Servo Driver.
cpf01
Parameter Unit
transmission er-
2
Occurred while the Parame-
ter Unit was being used.
Internal element is malfunc-
tioning.
Reset and then run again.
ror 2
g
Internal element is dam-
aged.
Replace Servo Driver.
Application
Chapter 4
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