7 Advanced Settings
7 - 30
High-function General-purpose Inverter RX2 Series User’s Manual
Precautions for Correct Use
• For the procedures from the auto-tuning start to the auto-tuning finish, check 6-2-3 Auto-tun-
ing of Motor on page 6-14 and follow the procedures.
• In the IVMS auto-tuning, the tuning should be done as the motor shaft is being rotated little
by little. When the motor shaft is locked, or when the load is heavy, even a normal finish of
the auto-tuning may result in a adjustment failure. Conduct the IVMS auto-tuning with nothing
attached to the motor shaft.
• When an over current occurs during the automatic operation of the IVMS auto-tuning, check
the following items.
(1) Motor lock caused by braking and/or foreign objects.
(2) Setting over-current detection level [bb160]
Check these items, and when there is no problem, conduct the IVMS auto-tuning by incre-
menting the minimum pulse width adjustment [Hd-50] by 10 each time.
• It may take approximately 5 minute to conduct the IVMS auto-tuning.
5 Run test running
• Set the main-speed command [FA-01] at a value that is smaller than the lowest frequency
(switch) [Hd130], and check that stable drive can be provided for the forward revolutions, the
backward revolutions, the acceleration, and the deceleration.
• Then, Set the main-speed command [FA-01] at a value that is larger than the lowest fre-
quency (switch) [Hd130], and check that stable drive can be provided for the forward revolu-
tions, the backward revolutions, the acceleration, and the deceleration.
Precautions for Correct Use
When the adjustment has been conducted repeatedly but no trial operation can be conducted,
it may be due to the unavailability of IVMS start mode for use. Use the synchronous starting
mode.
6 Conduct real operation
• Combine the target motor with a load device that you want to drive actually and then start the
operation, and then check whether the motor can provide a stable drive. The drive perfor-
mance may be improved by conducting a parameter adjustment. For more details, see the fol-
lowing.
• For the adjustment of the high-speed (lowest frequency (switch) or higher), see also the
descriptions of the synchronous starting mode.
Becoming unstable.
Stable operation.
Change the following parameter settings and carry out
IVMS auto-tuning again.
(1) Open-phase voltage-detection gain selection [Hd-43]:
Adjust by Incrementing the value from 00 to 03 by
one each time.
(2) Minimum pulse width adjustment [Hd-50]:
Adjust by incrementing the value by 10 each time.
Finish the test running.
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