115
Setting of acceleration/deceleration time and acceleration/ deceleration pattern
(4) Setting the acceleration/deceleration time in the low-speed range
(Pr.791, Pr.792)
If torque is required in the low-speed range (rated motor frequency/10), set the
Pr.791 Acceleration time in low-speed range
and
Pr.792 Deceleration time in low-speed range
settings higher than the
Pr.7 Acceleration time
and
Pr.8 Deceleration time
(When the second function is enabled, the setting is applied.) settings so that the slow acceleration/deceleration is
performed in the low-speed range.
(
for the rated motor frequency.)
REMARKS
The RT signal acts as the second function selection signal and makes the other second functions valid.
If the
Pr. 20
setting is changed, the
Pr. 125 and Pr. 126 (frequency setting signal gain frequency)
settings do not change.
Set
Pr. 125 and Pr. 126
to adjust the gains.
When the
Pr. 7, Pr. 8, Pr. 44 and Pr. 45
settings are 0.03s or less, the acceleration/deceleration time is 0.04s. At that time, set
Pr.
20
to "120Hz" or less.
Set
Pr.791
higher than
Pr.7
, and
Pr.792
higher than
Pr.8
. If set as
Pr.791
<
Pr.7
, the operation is performed as
Pr.791
=
Pr.7
. If set
as
Pr.792
<
Pr.8
, the operation is performed as
Pr.792
=
Pr.8
.
Any value can be set to the acceleration/deceleration time, but the actual motor acceleration/deceleration time cannot be made
shorter than the shortest acceleration/deceleration time determined by the mechanical system J (moment of inertia) and motor torque.
Parameters referred to
Pr. 3 Base frequency
Pr. 10 DC injection brake operation frequency
Pr. 29 Acceleration/deceleration pattern selection
Pr. 125, Pr. 126 (frequency setting gain frequency)
Pr. 178 to Pr. 182 (input terminal function selection)
IPM
IPM
IPM
Low-speed range
(rated motor frequency/10)
Acceleration time
Slope set by
Pr.7
Deceleration time
Slope set by
Pr.8
Deceleration time
in low-speed range
Slope set by
Pr.792
Acceleration time
in low-speed range
Slope set by
Pr. 791
Time
Output
frequency
(Hz)
Содержание FR-F700PJ Series
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Страница 346: ...341 APPENDIX This chapter provides the APPENDIX of this product Always read the instructions before using the equipment ...
