Inovance SV670P Series Troubleshooting Guide

Description of Warning Codes
‑27‑
Cause
Confirming Method
Solution
7. The load moment of
inertia ratio is too large.
Perform moment of inertia
auto‑tuning according to
section "Inertia auto‑tuning"
in SV660N 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 servo drive with
large capacity.
● 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
during cyclic operation and
check whether the motor is
in the deceleration status
continuously.
9. The capacity of the servo
drive or the regenerative
resistor is insufficient.
View the motor speed curve
in an individual cycle and
calculate whether the
maximum braking energy
can be absorbed
completely.
10. The servo drive is faulty.
‑
Replace with a new servo
drive.
● E922.0: Resistance of the external regenerative resistor too small
Cause:
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).
Cause
Confirming Method
Solution
When an external
regenerative resistor is used
(H02.25 = 1 or 2), the
resistance of this resistor is
lower than the minimum
resistance allowed by the
servo drive.
Measure whether the
resistance of the external
regenerative resistor
between terminals P⊕ and
C is lower than the value of
H02.21 (Permissible
minimum resistance of
regenerative resistor).
● If yes, replace with an
external regenerative
resistor that matches the
servo drive, then set
H02.27 according to the
resistance of the resistor
used. Finally, connect the
new resistor between P⊕
and C.
● If not, set H02.27 to a value
consistent with the
resistance of the external
regenerative resistor used.
● E924.0: Braking junction temperature too high
Cause:

Inovance SV670P Series Specifications

General

Brand	Inovance
Model	SV670P Series
Category	Servo Drives
Language	English