Description of Fault Codes
‑85‑
Cause
Confirming Method
Solution
5. The input pulse frequency
is high.
When the position reference
source is pulse reference,
check whether the input
pulse frequency is too high
or whether the acceleration/
deceleration time is set to 0
or an excessively low value.
Reduce the position
reference frequency or the
electronic gear ratio.
If position pulses are
outputted through the host
controller, you can set the
acceleration/deceleration
time through the host
controller directly. If not,
increase the values of
H05.04 and H05.06.
6. The value of H0F.08
(Threshold of excessive
position deviation) is too
low under current operating
conditions.
Check whether the value of
H0F.08 is too low.
Increase the setpoint of
H0F.08.
7. The servo drive/motor is
faulty.
Monitor the operation
waveform through the
oscilloscope function in the
software tool: position
references, position
feedback, speed references,
and torque references.
If the position reference is
not 0 but the position
feedback is always 0, replace
the servo drive or motor.
● EB02.1: Fully closed‑loop position deviation overflow
Cause:
The absolute value of the fully closed‑loop position deviation is greater than 2
31
.
Cause
Confirming Method
Solution
1. U/V/W output phase loss
or incorrect phase sequence
occurs on the drive.
Perform a no‑load trial run
on the motor and check the
wiring.
Connect cables again
according to the correct
wiring diagram or replace
the cables.
2. The drive U/V/W cables or
the encoder cable is
disconnected.
Check the wiring.
Connect the cables again.
The drive power cables must
be connected in the correct
order at both ends. Replace
with new cables if necessary
and ensure cables are
connected properly.
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