Inovance SV670P Series - Page 75

Description of Fault Codes
‑74‑
Cause
Confirming Method
Solution
An error occurs when writing
the position offset after
angle auto‑tuning.
Replace with a new encoder
cable. If the fault no longer
occurs after cable
replacement, it indicates the
original encoder cable is
damaged. Keep the motor in
a certain position, power on
the system several times
and observe the change of
H0b.17 (Electrical angle).
The electrical angle
deviation should be within
±30° when the motor
position does not change.
Replace with a new encoder
cable. If the fault persists
after the encoder cable is
replaced, the encoder may
be faulty. In this case,
replace the servo motor.
● E760.0: Encoder overtemperature
Cause:
The temperature of the absolute encoder is too high.
Cause
Confirming Method
Solution
The temperature of the
absolute encoder is too
high.
Measure the encoder or
motor temperature.
Switch off the S‑ON signal to
wait for the encoder to cool
down.
● E765.0: Nikon encoder over‑temperature or overspeed
Cause:
The temperature of the absolute encoder is too high.
Cause
Confirming Method
Solution
The temperature of the
absolute encoder is too
high.
Measure the encoder or
motor temperature.
Switch off the S‑ON signal to
wait for the encoder to cool
down.
● E770.0: Pulse closed‑loop scale fault ‑ Phase‑A
Cause
Confirming Method
Solution
Fully‑closed loop phase A
input differential voltage is
too low
1. Measure the phase A
differential voltage to
check if it is below 2.5 V.
2. Check the wiring of the
external encoder.
1. Adjust the fully‑closed
loop phase A input
voltage.
2. Replace the external
encoder or cable.
● E770.1: Fully‑closed loop input phase B wire breakage