Pr.29
.The
acceleration/deceleration
pattern
can
be
selected according to
the
epplicetin.
o
(hr accekratiod'decderotion
paw)
I
This
is
the
general acceleratioddecelertion
panem
and
the
motor
b
usually operated with this setting.
i
p*
gh
..........
a
rm
Mng:
1
(S-pattem
A)]
This pattem
is
used
for
the
apphcatiw which require quick
acceleration or deceleration in the high speed range
(over
WHz).
In
this
pattern,
W
(base
frequency) is taken
as
the point
of
gfI
f
*
inHeUion. Using
thk
pattern,
it
is
pome
to
set
ths
accekrtioddeceleration time which
Ms
the
motor
toque
reduction
in
the
constant
Hf
output operation range over
WHz.
llw
pattern
is
applicable to controlling
the
spindle
speed
of
machine tools.
b
...
I
nim
Mote:
For
the
value
to
be
set, use the time necessary lor acceleration up to
the
base lrequency
W
The actual acceleration time
11'
seconds
beyond
the
base
frequency
"W
is calculated by
the
(Pr.3) instead
of
the
acceleratiorddeceleratim
rderence lrequency (Pr.20).
following formula.
Setting:
2
(S-pattern
B)
I
Acceleratiorddeceieration
is atways controlled in S-pattem withtn
the range
of
72'
(current Irequency) to
"ll'
(target frequency).
Therefore, shock during acceleration and decelration
is
minimized
and this control can be used to prevent
loads
from being toppled
over.
A
A
r-
Note:
Even if this parameter
is
written during operation,
it
will
be
validated after the inverter
is StODDed.
-70-
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