Hitachi SJ Series, User Manual

Page: 249 / 786

Chapter 12
•
•
Chapter 12
• Please refer to the following in addition to the notes
for each control mode.
• When the revolution of the motor is hindered by
breaking or the motor lock caused by foreign
objects may cause over current or the like. When
no such adjustment as ones mentioned above
improves the state,
motor may sometimes improves it.
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Phenomenon
• The motor speed
follows the command
slowly.
• The motor operates
unstably.
• Overshoot and/or
hunting occur.
• The motor speed
oscillates gently.
• Stabilization of the
operation requires a long
time.
• It takes time for the
command value and
motor speed to be equal
to each other.
Chapter 12
Please refer to the following in addition to the notes
each control mode.
When the revolution of the motor is hindered by
breaking or the motor lock caused by foreign
objects may cause over current or the like. When
no such adjustment as ones mentioned above
improves the state, checking the portion around the
motor may sometimes improves it.
Phenomenon
►
The motor speed
follows the command
The motor operates
Overshoot and/or
hunting occur.
The motor speed
oscillates gently.
Stabilization of the
operation requires a long
It takes time for the
command value and the
motor speed to be equal
to each other.
Please refer to the following in addition to the notes
When the revolution of the motor is hindered by
breaking or the motor lock caused by foreign
objects may cause over current or the like. When
no such adjustment as ones mentioned above
checking the portion around the
motor may sometimes improves it.
Estimated cause(s)
follows the command
• Response of the output
is slow and the change
in the fed
slow.
• Response to the
fed-back value is too
quick.
operation requires a long
• Response to the
integral operation is
slow.
the
motor speed to be equal
• Response of the output
is slow and the change
in the fed
slow.
Please refer to the following in addition to the notes
When the revolution of the motor is hindered by
breaking or the motor lock caused by foreign
objects may cause over current or the like. When
no such adjustment as ones mentioned above
checking the portion around the
Estimated cause(s)
►
Response of the output
is slow and the change
in the fed-back value is
Response to the
back value is too
Response to the
integral operation is
Response of the output
is slow and the change
in the fed-back value is
12-9-32
Please refer to the following in addition to the notes
When the revolution of the motor is hindered by
objects may cause over current or the like. When
checking the portion around the
• If an application of load results in a great amount of
change in the inverter's output frequency monitor
[dA
a
non
suppression function may work depending upon
the settings of the functions. For details, see "Chap.
18: Troubleshooting."
►
• Increment the proportional (P) gain [Hb170].
Response of the output
is slow and the change
back value is
• Decrement the proportional (P) gain [Hb170]. back value is too
• Increment the integral (I) gain [Hb171].
integral operation is
• Decrement the integral (I) gain [Hb171].
Response of the output
is slow and the change
back value is
32
If an application of load results in a great amount of
change in the inverter's output frequency monitor
[dA-01], a function
automatically, such as overload limiting function,
non-stop at momentary
suppression function may work depending upon
the settings of the functions. For details, see "Chap.
18: Troubleshooting."
Exemplar measures to be taken
rement the proportional (P) gain [Hb170].
Decrement the proportional (P) gain [Hb170].
Increment the integral (I) gain [Hb171].
Decrement the integral (I) gain [Hb171].
If an application of load results in a great amount of
change in the inverter's output frequency monitor
01], a functions which change frequencies
utomatically, such as overload limiting function,
t momentary-stop, and over volt
suppression function may work depending upon
the settings of the functions. For details, see "Chap.
18: Troubleshooting."
Exemplar measures to be taken
rement the proportional (P) gain [Hb170].
Decrement the proportional (P) gain [Hb170].
Increment the integral (I) gain [Hb171].
Decrement the integral (I) gain [Hb171].
Inverter Function
If an application of load results in a great amount of
change in the inverter's output frequency monitor
which change frequencies
utomatically, such as overload limiting function,
stop, and over volt
suppression function may work depending upon
the settings of the functions. For details, see "Chap.
Exemplar measures to be taken
rement the proportional (P) gain [Hb170].
Decrement the proportional (P) gain [Hb170].
Increment the integral (I) gain [Hb171].
Decrement the integral (I) gain [Hb171].
Inverter Function
If an application of load results in a great amount of
change in the inverter's output frequency monitor
which change frequencies
utomatically, such as overload limiting function,
stop, and over voltage
suppression function may work depending upon
the settings of the functions. For details, see "Chap.
Exemplar measures to be taken
rement the proportional (P) gain [Hb170].
Decrement the proportional (P) gain [Hb170].
Inverter Function
If an application of load results in a great amount of
change in the inverter's output frequency monitor
the settings of the functions. For details, see "Chap.