4-15
4-4
Troubleshooting
When an error occurs, check the error contents by means of the operating status and
alarm display, investigate the cause and apply the appropriate countermeasures.
H
Error Diagnosis by Means of Operating Status
Symptom
Probable cause
Items to check
Countermeasures
The power supply indicator
(PWR) does not light even
when the power supply is
turned on.
Power supply lines are in-
correctly wired.
•
Check the power supply
voltage.
•
Check the power supply
lines.
•
Correct the power supply.
•
Correct the wiring.
The motor does not oper-
ate even when command
pulses are input. (No
l
i
t
t )
The RUN signal is OFF
(when Cn-01 bit no. 0 is “0”).
Check the RUN signal’s ON
and OFF by means of the
monitor mode.
•
Input the RUN signal.
•
Correct the wiring.
(
alarm is output.)
The correspondence be-
tween the Servo Driver and
the Servomotor is incorrect.
Check the models.
Combine models that corre-
spond correctly.
The POT and NOT signals
are OFF (when Cn-01 bit
nos. 2 and 3 are “0”).
Check whether POT and
NOT are displayed in status
display mode.
•
Turn ON the POT and
NOT signals.
•
If POT and NOT are not
being used, set Cn-01 bit
nos. 2 and 3 to “1.”
The mode is the internal
speed control setting mode.
Check Cn-02 bit no. 2.
Set Cn-02 bit no. 2 to “0” un-
less internally set speed
control is being used.
The deviation counter reset
input (ECRST) is ON.
Check the deviation counter
reset signal in monitor mode
(internal status bit display).
•
Turn OFF the ECRST sig-
nal.
•
Correct the wiring.
An error occurred with the
RESET signal ON.
Check the RESET signal’s
ON and OFF by means of
the monitor mode.
Turn the RESET signal OFF
and take measures
according to the alarm
display.
The setting for the command
pulse mode is not correct
(Cn-02 bits 3, 4, 5).
Check positioner’s
command pulse type and
Driver’s command pulse
mode.
Set according to the
controller command pulse
type.
The motor operates mo-
mentarily, but then it does
not operate.
The setting for the number
of encoder pulses is incor-
rect.
Check whether Cn-11 is
“2048.”
Set Cn-11 to “2048.”
The Servomotor power lines
or encoder lines are wired
incorrectly.
Check the Servomotor pow-
er line U, V, and W phases,
and the encoder line wiring.
Correct the wiring.
Application
Chapter 4
