Description of Fault Codes
‑70‑
An encoder multi‑turn counting error occurs.
Cause
Confirming Method
Solution
The encoder is faulty.
Set H0d.20 to 2 to clear the
fault, but E733.0 persists
after restart.
Replace the motor.
● E735.0: Encoder multi‑turn counting overflow
Cause:
A multi‑turn counting overflow occurs on the absolute encoder.
Cause
Confirming Method
Solution
The number of forward
revolutions exceeds 32767
or the number of reverse
revolutions exceeds 32768.
Check whether the value of
H0b.70 (Number of absolute
encoder revolutions) reach
32767 or 32768 when the
servo drive works in the
absolute linear mode
(H02.01 = 1).
1. This fault can be hidden in
cases where no multi‑turn
absolute position is
needed but the absolute
position during running
needs to be recorded.
2. The rotation mode
applies to occasions
where only single‑turn
absolute position needs
to be recorded.
3. Set H0d.20 to 2 to power
on again. Perform homing
if necessary.
● E740.0: Encoder communication timeout
Cause:
Communication timeout occurs on the absolute encoder.
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