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114
Setting of acceleration/deceleration time and acceleration/ deceleration pattern
(2) Deceleration time setting
(Pr. 8, Pr. 20)
Use
Pr. 8
Deceleration time
to set the deceleration time required to reach 0Hz from
Pr. 20
Acceleration/deceleration reference
frequency
.
Set the deceleration time according to the following formula.
DC injection brake is not applied until the frequency drops to 0Hz regardless of the
Pr.10
setting under IPM motor control. Under IPM motor control, calculate
as
Pr.10
="0."
(3) Set two kinds of acceleration/deceleration times (RT signal,
Pr. 44, Pr. 45
)
Pr. 44
and
Pr. 45
are valid when the RT signal is ON.
When "9999" is set to
Pr. 45
, the deceleration time becomes equal to the acceleration time
(Pr. 44)
.
For the RT signal, set "3" in any of
Pr. 178 to Pr. 182 (input terminal function selection)
to assign the function.
Deceleration
time setting
=
Pr. 20
Deceleration time from maximum operating frequency to stop
Maximum operating frequency -
Pr. 10
Example) How to find the setting value for
Pr.8
when decreasing the output
frequency from the maximum frequency of 50Hz in 10s with
Pr.20
=120Hz and
Pr.10
=3Hz.
Pr. 8
=
120Hz
10s
25.5s
50Hz-3Hz
NOTE
When the acceleration/deceleration pattern is S-pattern acceleration/deceleration A
(refer to page 118)
, the acceleration/
deceleration time is the time required to reach
Pr. 3 Base frequency
. When the S-pattern acceleration/deceleration A is
set under IPM motor control, acceleration/deceleration time is the time to reach the rated motor frequency (
Acceleration/deceleration time formula when the set frequency is the base frequency or higher
Changing terminal assignment may affect the other functions. Set parameters after confirming the function of each
terminal.
Guideline for acceleration/deceleration time at the
Pr. 3 Base frequency
of 60Hz (0Hz to set frequency)
t=
4
T
f
2
+
5
T
T: Acceleration/deceleration time setting (s)
f: Set frequency (Hz)
9
(Pr. 3)
2
9
Frequency setting (Hz)
60
120
200
400
Acceleration/
deceleration time (s)
5
5
12
27
102
15
15
35
82
305
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 ...