5-15
Display
Countermeasures
Cause of error
Status when error
occurs
Error
Rotation speed mis-
match (ABS)
Occurs when the
control circuit power
supply is turned ON.
Pn205 (absolute en-
coder rotation limit
setting) changed.
Perform absolute encod-
er rotation limit setting
change (Fn013).
pp y
Pn205 (absolute en-
coder rotation limit
setting) changed by
mistake.
Set Pn205 correctly
Deviation counter
overflow
Servomotor will not
rotate even when
command pulses
Servomotor power
or encoder line is
wired incorrectly.
Rewire correctly.
p
are input.
Locked mechanical-
ly
Repair if the Servomotor
shaft is locked
Control panel error
Replace the Servo Driver.
Occurs when rotat-
ing at high speed
Servomotor power
or encoder line is
miswired.
Rewire correctly.
Occurs when long
command pulses
Gain adjustment is
insufficient.
Adjust the gain.
co
a d pu ses
are sent
Acceleration and de-
celeration is too vio-
lent.
Lengthen acceleration
and deceleration time.
Use position command
filter (Pn207.0, Pn204,
and Pn208).
Load is too large.
Lighten the load.
Reselect the Servomotor.
Motor-load deviation
over level error
Occurs during op-
eration
Difference between
internal and external
encoder exceeds
the setting of Pn51A
Option Unit detec-
tion error
Occurs if an option
has been connected
to the driver
Option board has
been removed
Go to Fn014. Press data.
Display shows “0 unit”.
Press mode, display
shows “done”. Reset the
equipment.
Missing phase de-
tected.
Occurs when servo
is ON.
Main circuit power
supply is not con-
nected.
Main circuit power
supply phase is mis-
sing, or wire is
burned out.
Check the main circuit
power supply wiring.
Parameter Unit
transmission error 1
Occurs when power
supply is turned ON.
Servo Driver is de-
fective.
Replace the Servo Driver.
Parameter Unit
transmission error 2
Occurs when Pa-
rameter Unit is in
Internal element
misoperation
Reset the alarm, then re-
start the operation.
a s ss o e o
a e e U
s
use.
Internal element is
broken
Replace the Servo Driver.
Troubleshooting
Chapter 5
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