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er7
Tuning error
Problem Auto-tuning
failed.
Possible Causes
What to Check and Suggested Measures
(1) A phase was missing
(There was a phase
loss) in the connection
between the inverter
and the motor.
Î
Properly connect the motor to the inverter.
(2) V/f or the rated current
of the motor was not
properly set.
Check whether the data of function codes matches the motor
specifications.
Motor 1: F04, F05, H50 through H53, P02, and P03
Motor 2: A02, A03, A16, and A17
(3) The wiring length
between the inverter
and the motor was too
long.
Check whether the wiring length between the inverter and the motor
exceeds 50 m.
Î
Review, and if necessary, change the layout of the inverter and
the motor to shorten the connection wire. Alternatively, minimize
the wiring length without changing the layout.
Î
Disable both auto-tuning and auto-torque boost (Set the data of
F37 or A13 to "1").
(4) The rated capacity of the
motor was significantly
different from that of the
inverter.
Check whether the rated capacity of the motor is three or more
ranks lower, or two or more ranks higher than that of the inverter.
Î
Replace the inverter with one with an appropriate capacity.
Î
Manually specify the values for the motor parameters P06, P07
and P08 or A20, A21 and A22.
Î
Disable both auto-tuning and auto-torque boost (Set the data of
F37 or A13 to "1").
(5) The motor is a special
type such as a
high-speed motor.
Î
Disable both auto-tuning and auto-torque boost (Set the data of
F37 or A13 to "1").
(6) A tuning operation
involving motor rotation
(P04 or A18 = 2) was
attempted while the
brake was applied to the
motor.
Î
Specify the tuning that does not involve the motor rotation (P04
or A18 = 1).
Î
Release the brake before tuning that involves the motor rotation
(P04 or A18 = 2).
For details of tuning errors, refer to Chapter 4, Section 4.1.3 "Preparation before a test
run--Configuring function code data,
Tuning errors."