Description of Warning Codes
‑23‑
Cause
Confirming Method
Solution
DO1–DO5 function
selections are invalid.
H0b.45= 0x 1902. Check
whether H04.00, H04.02,
H04.04, H04.06 and H04.08
are set to invalid values.
Set DO function parameters
to valid values.
● E902.2: Invalid setting for torque reach
Cause:
The DO parameters set for torque reach in the torque control mode are invalid.
Cause
Confirming Method
Solution
The DO parameters set for
torque reach in the torque
control mode are invalid.
Check whether the value of
H07.22 is lower than or
equal to the value of H07.23
(unit: 0.1%).
Set H07.22 to a value higher
than that of H07.23.
● E908.0: Model identification failure
Cause
Confirming Method
Solution
1. The model identification
check word store in e2prom
is incorrect.
Check whether the warning
persists after restart.
Set H01‑72 to 1 to disable
model identification
temporarily.
2. The model parameters are
not written in the drive
before delivery.
Check whether parameters
can be saved to e2prom.
● E909.0: Motor overload warning
Cause:
The accumulative heat of the motor reaches the warning threshold (90% of the
maximum allowable heat).
Cause
Confirming Method
Solution
1. The motor cables and
encoder cable are
connected improperly or in
poor contact.
Check the wiring among the
servo drive, servo motor and
the encoder according to
the correct wiring diagram.
Connect cables according to
the correct wiring diagram.
It is recommended to use
the cables provided by
Inovance.
When customized cables are
used, prepare and connect
the customized cables
according to the wiring
instructions.
2. The load is so heavy that
the effective torque
outputted by the motor
keeps exceeding the rated
torque.
Confirm the overload
characteristics of the servo
drive or motor.
Check whether the average
load rate (H0b.12) keeps
exceeding 100.0%.
Use a servo drive of higher
capacity and a matching
servo motor.
Reduce the load and
increase the acceleration/
deceleration time.
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