Table of Contents
Advertisement
Chapter 4
(2) Curve constant (swelling degree)
Specify the swelling degree of the acceleration curve with reference to the following graphs:
Output frequency (Hz)
Target
frequency
(100%)
96.9
10
82.4
17.6
02
3.1
10
25
50
Acceleration time (100%) to reach the
set output frequency
The acceleration or deceleration time may be shortened midway through the acceleration or deceleration according to
the S-curve pattern.
If the LAD cancellation (LAC) function has been assigned to an intelligent input terminal and the LAC terminal is turned
on, the selected acceleration and deceleration patterns are ignored, and the output frequency is quickly adjusted to
that specified by the frequency command.
(3) Curvature of EL-S-curve pattern
When using the EL-S-curve pattern, you can set the curvatures (A150 to A153) individually for acceleration and
deceleration.
If all curvatures are set to 50%, the EL-S-curve pattern will be equivalent to the S-curve pattern.
Output frequency rate (%)
100
Curvature for
acceleration 2
(A151)
50
4.2.26 Energy-saver operation
The energy-saver operation function allows you to automatically minimize the
inverter output power while the inverter is driving the motor at constant speed.
This function is suited to operating a fan, pump, or other load that has a
reduced-torque characteristic.
To use this function, specify "01" for the operation mode selection (A085).
Use the energy saving mode tuning function (A086) to adjust the response and accuracy of the energy-saver operation.
The energy-saver operation function controls the inverter operation comparatively slowly. Therefore, if a sudden
change in the load occurs (e.g., impact load is applied), the motor may stall, and, consequently, the inverter may trip
because of overcurrent.
Item
Operation mode selection
Item
Energy saving mode tuning
Output frequency (Hz)
Target
frequency
(100%)
99.6
02
93.8
87.5
68.4
64.6
35
75
Time
Acceleration time (100%) to reach the
set output frequency
Curvature for acceleration 1
(A150)
Function code
A085
Function code
A086
Output frequency (Hz)
Target
frequency
(100%)
10
02
10
25
50
75
Time
Curvature for
deceleration 1
(A152)
Curvature for
deceleration 2
(A153)
Time (s)
Data
00
Normal operation
01
Energy-saving operation
02
Fuzzy operation
Data
0
100
4-32
Explanation of Functions
65
02
35.4
31.6
10
12.5
6.25
0.39
25
50 75
Acceleration time (100%) to reach the
set output frequency
Related code
A085: Operation mode selection
A086: Energy saving mode tuning
Description
Response
Accuracy
Slow
High
Quick
Low
Time
Advertisement
Table of Contents
