Omron VARISPEED G7 -, Instruction Manual

Page: 364 / 417

Protective and Diagnostic Functions
7-
15
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.
Table 7.4 Errors During Autotuning
Display Meaning Probable causes Corrective Actions
Data Invalid Motor data error
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).
• Check the input data.
• Check the capacity of the Inverter and
motor.
• Check the motor rated current and no-
load current.
Minor Fault Alarm
A minor fault occurred during autotun-
ing (xxx).
• Check the input data.
• Check wiring and the machine.
• Check the load.
STOP key STOP key input
The STOP Key was pressed to cancel
autotuning.
Resistance
Line-to-line resis-
tance error
Autotuning was not completed in the
specified time.
The results of autotuning has exceeded
the setting range for a user constant. • Check the input data.
• Check motor wiring.
• If the motor is connected to the
machine, disconnect it.
No-Load Current No-load current error
Rated Slip Rated slip error
Accelerate
Acceleration error
(detected only for
rotational autotuning)
The motor did not accelerate in the spec-
ified time.
• 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.
Motor Speed
Motor speed error
(detected only for
rotational autotuning)
The torque reference was too high
(100%) during acceleration (for open-
loop vector control only).
• 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).
I-det. Circuit
Current detection
error
The current flow exceeded the motor
rated current.
Check the current detection circuit,
motor wiring, current detector, and
installation methods.
The detected current sign was the oppo-
site of what it should be.
There is a phase fault for U, V, or W.
Leak Inductance
Leakage inductance
error Autotuning was not completed in the
specified time.
Check motor wiring.
V/f Over Setting
V/f settings exces-
sive
*
The torque reference exceeded 100%
and the no-load torque exceeded 70%
during autotuning.
• Check and correct the settings.
• Disconnect the load from the motor.