Auto-Tuning Faults - Omron VARISPEED L7 Manual

Auto-tuning Faults

Auto-tuning faults are shown below. When the following faults are detected, the fault is displayed on the digi-
tal operator and the motor coasts to stop. No fault or alarm outputs will be operated.
Display
Fault
Minor Fault
STOP key
Resistance
No-Load Current
Rated slip
7
Accelerate
Motor Speed
I-det. Circuit
14
7-
Table 7.5 Auto-tuning Faults
Meaning
Motor data fault
Alarm
STOP key input
Line-to-Line Resistance Fault
No-Load Current Fault
Rated Slip Fault
Acceleration error (detected during
rotating autotuning only)
Motor Speed Fault
Detected only for rotating autotuning
Current Detection Fault
Probable causes
There is an error in the data input for
autotuning.
There is an error in the relationship
between the motor output and the
motor rated current.
There is an error between the no-load
current setting and the input motor
rated current (when auto-tuning for
line-to-line resistance is performed for
vector control)
An alarm is detected during auto-tun-
ing.
The STOP key was pressed to cancel
autotuning.
Autotuning was not completed in the
specified time.
The auto-tuning result is outside the
parameter setting range.
The motor did not accelerate in the
specified time.
Rotating autotuning was performed
with a high load connected.
The torque reference exceeded 100%
during acceleration.
Detected only when A1-02 is set to 2
(Open Loop Vector control).
The current exceeded the motor rated
current.
Any of U/T1, V/T2 and W/T3 has
open-phase
Corrective Actions
Check the input data.
Check the Inverter and motor
capacity.
Check the motor rated current and
no-load current.
Check the input data.
Check wiring and the machine.
Check the load.
-
• 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.
• 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.
• If the motor is connected to the
machine, disconnect it.
• Increase C1-01 (Acceleration
Time 1).
• Check the input data (particu-
larly the number of PG pulses
and the number of motor poles).
• Perform not rotating auto tuning
Check wiring of the Inverter and
the mounting.