6.4 Flux Vector Control
6-35
J
Performing Autotuning
D
Autotuning will start if the Run Key is pressed when the “Tuning Ready?” message is being displayed.
D
The motor will operate during autotuning, so be sure that it is safe for the motor to operate before press-
ing the Run Key.
D
The following message will be displayed when the Run Key is pressed:
Tune Proceeding
j
Hz
jjjj
A
The “Tune Proceeding” message will blink.
D
Autotuning takes up to 1.5 minutes. The message“Tune Successful” will be displayed when autotun-
ing is completed.
D
If autotuning has been completed successfully, press the Menu Key and proceed to the next operation.
D
If a fault occurred during autotuning, refer to Table 6.3 Autotuning Faults for details on correcting the
cause of the fault and perform autotuning again.
J
Autotuning Faults
D
One of the fault messages in the following table will be displayed if a fault occurs during autotuning
and the motor will stop. In this case, determine the cause of the fault, correct it, and perform autotuning
again.
D
The fault display can be cleared by pressing the MENU Key.
D
The motor constants will revert to their default settings if a fault occurs. Set these constants again be-
fore starting autotuning again.
Table 6.3 Troubleshooting Autotuning Faults for Open-loop Vector Control
Fault Display Probable Cause Remedy
Data Invalid
(Motor data fault)
There was a fault in the data
set during autotuning.
There was a fault in the rela-
tionship between the rated
frequency, rated speed, and
number of poles.
Change the settings to conform to the follow-
ing equation:
Rated speed < 120 × Motor frequency/Num-
ber of poles
A load is connected to the
motor shaft.
Remove the load.
ALARM: Over Load
The effective load factor ex-
ceeded 20% during autotun-
There was a setting fault dur-
ing autotuning.
Check the rated current setting. Change if
necessary.
xcess
ve tun
ng
oa
ing.
There is a motor bearing
problem.
Turn the Inverter off and rotate the motor by
hand.
Replace the motor if it doesn’t turn smoothly.
Motor speed
The torque reference value
There is a broken/discon-
nected motor power wire.
Check and replace wiring components if nec-
essary.
(Motor speed fault)
exceeded 100% during auto-
tuning.
A load is connected to the
motor shaft.
Remove the load.
The torque limit function is
operating.
Initialize the torque limit constants (H7-01 to
H7-04).
Accelerate
(Acceleration fault)
The motor doesn’t accelerate
within the prescribed time.
The acceleration time is too
short.
Increase acceleration time 1 (C1-01).
A load is connected to the
motor shaft.
Remove the load.
Rated Slip
(Rated slip fault)
The rated slip setting can’t
be tuned within the pre-
scribed time.
A load is connected to the
motor shaft.
Remove the load.
Saturation -1
(Iron core saturation coefficient
1 fault)
The core-saturation coeffi-
’
The rated current setting isn’t
correct.
Check and change the setting if necessary.
Saturation -2
(Iron core saturation coefficient
2 fault)
cients can’t be tuned within
the prescribed time.
There is a broken/discon-
nected motor power wire.
Check and replace wiring components if nec-
essary.
Resistance
(Line-to-line resistance fault)
The motor terminal resis-
tance or no-load current set-
The rated current setting isn’t
correct.
Check and change the setting if necessary.
No-load Current
(No-load current fault)
ting can’t be tuned within the
prescribed time.
There is a broken/discon-
nected motor power wire.
Check and replace wiring components if nec-
essary.
Motor Direction Fault
(Motor direction fault)
---
There is a faulty connection
between the Inverter and PC
(A or B phase) or the Invert-
er and Motor (U, V, or W
phase).
S Check the PG wiring.
S Check the motor wiring.
S Check the PG rotation direction and
constant F1-05.
6
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