Description of Fault Codes
‑74‑
Cause
Troubleshooting
Solution
3. The motor is stalled due
to mechanical factors.
Check the reference and
motor speed (H0b.00)
through the software tool or
keypad.
● References in the position
control mode: H0b.13
(Input position reference
counter)
● References in the speed
control mode: H0b.01
(Speed reference)
● References in the torque
control mode: H0b.02
(Internal torque reference)
Check whether the reference
value is not 0 but the motor
speed is 0 rpm in the
corresponding mode.
Rectify the mechanical‑
related problem.
The servo drive gain is too
low.
Check the position loop gain
and speed loop gain of the
servo drive.
● 1st gain set: H08.00...
H08.02
● 2nd gain set: H08.03...
H08.05
Adjust the gain values
manually or perform gain
auto‑tuning.
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