Description of Warning Codes
‑30‑
Cause
Confirming Method
Solution
Forward position reference
overtravel occurs in the
process segment position
mode.
E956.0 occurs when the
position reference exceeds
the value of H22.04 when
the motor runs forwardly in
the process segment
position mode.
Reduce the position
reference to a value lower
than the setpoint of H22.06.
● E958.0: Reverse position reference overtravel in process segment position mode
Cause:
Reverse direction position reference overtravel occurs in the process segment
position mode.
Cause
Confirming Method
Solution
Reverse position reference
overtravel occurs in the
process segment position
mode.
E958.0 occurs when the
position reference is less
than the value of H22.06
when the motor runs
reversely in the process
segment position mode.
Increase the position
reference to a value greater
than the setpoint of H22.06.
● E971.0: Undervoltage warning for voltage drop protection
Cause
Confirming Method
Solution
The bus voltage is lower
than the undervoltage
threshold.
Check the bus voltage. Check the power supply.
● E980.0: Encoder algorithm error
Cause:
An encoder algorithm error occurs.
Cause
Confirming Method
Solution
An encoder algorithm error
occurs
1. Check the wiring
2. If the servo drive is
powered off and on
several times but the
warning is still reported, it
indicates that the encoder
is faulty.
Replace the servo motor.
● EA41.0: Torque fluctuation compensation failure
Cause
Confirming Method
Solution
Auto‑tuning torque
fluctuation compensation
failure
‑
Turn off the torque
fluctuation compensation
function.
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