Auto-Tuning Faults - Omron VARISPEED L7 Guia De Inicio Rapido

Auto-tuning Faults

Auto-tuning faults are shown below. When the following faults are detected, the fault is displayed on the dig-
ital operator and the motor coasts to stop. No fault or alarm outputs will be operated.
Display
Accelerate
End - 1
V/f Over Setting
End - 2
Saturation
End - 3
Rated FLA Alm
Fault
I-det. Circuit
KE_ERR
(PM motor only)
LD_ERR
(PM motor only)
Leakage Induc-
tance Fault
Minor Fault
Motor Speed
No-Load Current
Resistance
Rated slip
RS_ERR
(PM motor only)
STOP key
Z_SRCH_ERR
(PM motor only)
EN-27
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Meaning
Acceleration error (detected during rotating autotuning
only)
The motor did not accelerate in the specified time.
V/f Settings Alarm
Displayed after auto-tuning is complete
The torque reference exceeded 100% and the no-load cur-
rent exceeded 70% during auto-tuning.
Motor Core Saturation Fault
Displayed after auto-tuning is complete.
Detected only for rotating autotuning
Rated Current Setting Alarm
Displayed after auto-tuning is complete
During auto-tuning, the measured value of motor rated
current (E2-01) was higher than the set value.
Motor data fault
Current detection error
The current exceeded the motor rated current or any out-
put phase is open
Voltage constant error
Inductance error
The leakage inductance measurement caused an error.
The leakage inductance tuning current was too high or too
low (Closed Loop Vector for PM only)
Any of the above listed alarms occured during autotuning
or the inverter was in Base Block condition when the tun-
ing was started.
Motor Speed Fault
Detected only for rotating autotuning
The torque reference exceeded 100% during acceleration.
Detected only when A1-02 is set to 2 (Open Loop Vector
control).
No-Load Current Fault
Line-to-Line Resistance Fault
Rated Slip Fault
Line-to-line resistance error
STOP key input
All encoders:
The motor speed exceeded 20 rpm at the auto tuning start.
The magnetic pole position tuning could not be performed
in the specified time.
Encoder with Z-pulse:
The difference between two measurements of the magnet
pole position was higher than 3°.
Serial encoders:
The difference between two measurements of the magnet
pole position was higher than 5° or an encoder serial com-
munication error has occurred during the tuning.
Corrective Actions
• Increase C1-01 (Acceleration Time 1).
• Increase L7-01 and L7-02 (Torque Limits) if they are low.
• Remove the ropes and repeat the tuning.
• Check and correct the motor settings
• If the motor and the machine are connected, disconnect the
motor from the machine.
• Check the input data.
• Check the motor wiring.
• If the motor and the machine are connected, disconnect the
motor from the machine.
Check the motor rated current value.
• Check the input data.
• The motor and inverter capacity do not fit. Check the Inverter
and motor capacity.
• Check the motor rated current and no-load current.
Check wiring of the Inverter and the mounting.
Check the motor wiring
Check the motor wiring
• Check the motor wiring.
• Check the motor rated current input value
• Reduce or increase the current level for leakage inductance
tuning by changing parameter n8-46.
• Leave the tuning menu, check the alarm content and remove
the cause as described in the alarm list above.
• Check the input data.
• Make sure that the inverter is not in Base Block condition
during the tuning.
• If the motor is connected to the machine, disconnect it.
• Increase C1-01 (Acceleration Time 1).
• Check the input data (particularly the number of PG pulses
and the number of motor poles).
• Perform not rotating auto tuning
• Check the input data.
• Check the motor wiring.
• If the motor is connected to the machine, disconnect it.
• If the setting of T1-03 is higher than the Inverter input power
supply voltage (E1-01), change the input data.
• Check the motor wiring
• Check the motor input data
-
• Remove the ropes and repeat the tuning
• Check the encoder rotation direction and if necessary change
F1-05.
• Check the encoder wiring (order, shield etc.)
• Check the encoder power supply.
Replace the encoder.