Hitachi SJ Series, User Manual

Page: 242 / 786

12-9-25
Chapter 12 Inverter Function
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 frequency (switch)
[Hd130], and check that stable drive can be provided
for the forward revolutions, the backward revolutions,
the acceleration, and the deceleration.
Stable operation.
• Finish the test running. Proceed to "6 Conduct
real operation."
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 performance
may be improved by conducting a parameter
adjustment. For more details, see the following.
• For the adjustment of the high-speed (lowest
frequency (switch) or higher), see also the
descriptions of the synchronous starting mode.
• During the real operation, do not change the
following parameters set in 4 "conduct the IVMS
auto-tuning," and "5 Conduct a trial operation."
Such change may destabilize the operations.
• Open-phase voltage-detection gain selection
[Hd-43]
• Minimum pulse width adjustment [Hd-50]
• 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,
or please contact the sales officer of our company.
Becoming unstable.
• Change the following parameter settings re-conduct
"4 Conduct IVMS auto-tuning".
(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.
5
6
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