Inovance SV670N Series - Page 76

Description of Fault Codes
‑75‑
Cause
Confirming Method
Solution
BISS fully closed‑loop
external loop encoder
communication CRC error
Check the communication
cable for interference.
Replace the cable with a
shielded twisted pairs.
● E770.5: BISS response data error
Cause
Confirming Method
Solution
BISS fully closed‑loop
external loop encoder
response data error
Check the communication
cable for interference.
Replace the cable with a
shielded twisted pairs.
● E770.6: Fully closed‑loop 2nd encoder initialization communication error
Cause
Confirming Method
Solution
1. The encoder cable
connections are incorrect or
loosened.
1. Check the encoder cable
connections.
2. Check whether vibration
on site is too strong,
which loosens the
encoder cable and even
damages the encoder.
1. Connect the encoder
cables according to the
correct wiring diagram.
2. Re‑connect encoder
cables and ensure
encoder terminals are
connected securely.
2. The servo drive is faulty.
The fault persists after the
servo drive is restarted.
Replace the servo drive.
● E770.7: Fully closed‑loop Inovance 2nd encoder communication error