Description of Warning Codes
‑23‑
Cause
Troubleshooting
Solution
6. The input voltage of the
main circuit is beyond the
specified range.
Check whether the input
voltage of the main circuit
cable on the drive side is
within the following range:
● 220 V servo drive:Value
range: 220 V to 240
VAllowable deviation: –
10% to +10% (198 V to 264
V)
● 380V servo drive:Value
range: 380 V to 440
VAllowable deviation: –
10% to +10% (342V to
484V)
Replace or adjust the power
supply according to the
specified range.
7. The load moment of
inertia ratio is too large.
Perform moment of inertia
auto‑tuning according to
section "Inertia auto‑tuning"
in SV660F Series Servo Drive
Function Guide or calculate
the total mechanical inertia
based on mechanical
parameters.
Check whether the actual
load inertia ratio exceeds 30.
● Select an external
regenerative resistor with
large capacity and set
H02.26 to a value
consistent with the actual
power.
● Select a larger servo drive.
● Reduce the load if allowed.
● Increase the acceleration/
deceleration time if
allowed.
● Increase the motor
operation cycle if allowed.
8. The motor speed is
excessively high and
deceleration is not done
within the set time. The
motor is in the continuous
deceleration status during
cyclic operation.
View the motor speed curve
in cycle running and check
whether the motor is in
deceleration status for a
long period.
9. The capacity of the servo
drive or the regenerative
resistor is insufficient.
View the motor's single cycle
speed curve and calculate
whether maximum braking
energy can be absorbed
completely.
10. The servo drive is faulty.
‑
Replace the servo drive.
● E922.0: Resistance of the external regenerative resistor too small
Description:
The value of H02.27 (resistance of external regenerative resistor) is lower than the
value of H02.21 (permissible min. resistance of external regenerative resistor).
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