Hitachi SJ Series, User Manual

Page: 215 / 786

12-8-10
Chapter 12 Inverter Function
Curve constant (degree of bulging) of pattern
• Determine the bulging degree by referring to the
following figure.
EL-S-shaped curve's curvature
• Use of an EL-S-shaped curve allows the curvature
settings [AC-08] to [AC-11] for
acceleration/deceleration.
Parameter
• Setting all the curvatures at 50 (%) makes the
EL-S-shaped curve equivalent to an S-shaped curve.
• When setting the pair of [AC-08] and [AC-09] or that of
[AC-10] and [AC-11], divide 100(%) into 2 segments, and
assign one of which to the former of the pair and the
other to the latter thereof (i.e., the two segments, if
summed up, render a value up to 100%).
• A setting where [AC-08] = 100 and [AC-09] = 0 makes the
acceleration curve a U-shaped acceleration curve.
Item Parameter Data Description
Acceleration pattern selection
Deceleration pattern selection [AC-03]
[AC-04]
00 Linear acceleration/deceleration
01
S-shaped
acceleration/deceleration
02
U-shaped
acceleration/deceleration
03
Inverse-U-shaped
acceleration/deceleration
04
EL-S-shaped
acceleration/deceleration
Acceleration curve constant
Deceleration curve constant [AC-05]
[AC-06]
1~10
1 (small bulging)
10 (large bulging)
Curvature 1 for EL-S-shaped
acceleration
[AC-08]
0~100(%)
Designate the curvature of the
curved sector when an
EL-S-shaped pattern is used.
(For acceleration)
Curvature 2 for EL-S-shaped
acceleration
[AC-09]
Curvature 1 for EL-S-shaped
deceleration
[AC-10]
0~100(%)
Designate the curvature of the
curved sector when an
EL-S-shaped pattern is used.
(For deceleration)
Curvature 2 for EL-S-shaped
deceleration
[AC-11]
Output frequency (Hz)
Target
Frequency
(100%)
96.9
82.4
17.6
3.1
Acceleration time until the
set value for the frequency
is reached (100%)
25 50 75
10
02
10
02
Time
Output frequency (Hz)
Target
Frequency
(100%)
99.6
93.8
35.0
Acceleration time until the
set value for the frequency
is reached (100%)
25 50 75
10
02
87.5
68.4
64.6
Time
Output frequency (Hz)
Target
Frequency
(100%)
65.0
35.4
0.39
Acceleration time until the
set value for the frequency
is reached (100%)
25 50 75
10
02
31.6
12.5
6.25
Time
Output frequency rate (%)
Time (s)
100
50
Curvature 1 for acceleration
[AC-08]
Curvature 2 for
acceleration
[AC-09]
Curvature 1 for
deceleration
[AC-10]
Curvature 2 for
deceleration
[AC-11]