Inovance IS620P Series - Er.939: Motor Power Cable Breaking; Er.941: Parameter Modification Taking Effect Only after Re-Power-On; Er.942: Parameter Storage too Frequent

Chapter 6 Troubleshooting IS620P User Manual
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8. Er.939: Motor power cable breaking
Cause:
•
The actual phase current of the motor is smaller than 10% of the rated motor current, the
actual motor speed is small but the internal torque reference is very large.
Cause Conrming Method Corrective Action
The motor power cables
break.
•
Check whether the difference
between H0B-24 (phase current
valid value) and H0B-02 (internal
torque reference) reaches over
500%. Meanwhile, H0B-00 (actual
motor speed) is smaller than one
fourth of the rated motor speed.
Check the motor power cable
connection and reconnect the
cables. If necessary, replace the
cables.
9. Er.941: Parameter modication taking effect only after re-power-on
Cause:
•
The modication of some parameters takes effect only after the servo drive is powered
on again. After the value of these parameters is modied, the servo drive reminds of re-
power-on.
Cause Conrming Method Corrective Action
Modify the parameters,
whose modication
takes effect only after
the servo drive is
powered on again.
•
Check whether you modify the
parameters, whose modication
takes effect only after the servo
drive is powered on again.
Re-power on the servo system.
10. Er.942: Parameter storage too frequent
Cause:
•
The number of parameters that are being modied simultaneously exceeds 200.
Cause Conrming Method Corrective Action
A great number of
parameters are modied
and stored frequently to
EEPROM (H0C-13 = 1).
•
Check whether the host controller
performs frequent and fast
parameter modication on the
servo drive.
Check the running mode. For
the parameters that need not be
stored in EEPROM, set H0C-13
to 0 before the writing operation
of the host controller.