Errors During Autotuning - Omron VARISPEED G7 Instruction Manual

Errors During Autotuning

The errors that can occur during autotuning are given in the following table. If an error is detected, the motor
will coast to a stop and an error code will be displayed on the Digital Operator. The error contact output and
alarm output will not function.
Display Meaning
Data Invalid Motor data error
Minor Fault Alarm
STOP key STOP key input
Line-to-line resis-
Resistance
tance error
No-Load Current No-load current error
Rated Slip Rated slip error
Acceleration error
Accelerate (detected only for
rotational autotuning)
Motor speed error
(detected only for
Motor Speed
rotational autotuning)
Current detection
I-det. Circuit
error
Leakage inductance
Leak Inductance
error
V/f settings exces-
V/f Over Setting
sive
*
Table 7.4 Errors During Autotuning
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.
The is an error between the no-load cur-
rent setting and the input motor rated
current (when autotuning for only line-
to-line resistance is performed for vector
control).
A minor fault occurred during autotun-
ing (xxx).
The STOP Key was pressed to cancel
autotuning.
Autotuning was not completed in the
specified time.
The results of autotuning has exceeded
the setting range for a user constant.
The motor did not accelerate in the spec-
ified time.
The torque reference was too high
(100%) during acceleration (for open-
loop vector control only).
The current flow exceeded the motor
rated current.
The detected current sign was the oppo-
site of what it should be.
There is a phase fault for U, V, or W.
Autotuning was not completed in the
specified time.
The torque reference exceeded 100%
and the no-load torque exceeded 70%
during autotuning.
Protective and Diagnostic Functions
Corrective Actions
• Check the input data.
• Check the capacity of the Inverter and
motor.
• 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 motor wiring.
• If the motor is connected to the
machine, disconnect it.
• Increase C1-01 (Acceleration Time 1).
• Increase L7-01 and L7-02 (Reverse
Torque Limits) if they are low.
• If the motor is connected to the
machine, disconnect it.
• 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).
Check the current detection circuit,
motor wiring, current detector, and
installation methods.
Check motor wiring.
• Check and correct the settings.
• Disconnect the load from the motor.
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