Changing The Acceleration/Deceleration Pattern - Hitachi WJ Series User Manual

Chapter 9
9.3.4

Changing the Acceleration/Deceleration Pattern

 How to lessen the shock when there are sudden movements in elevators or conveyors that could
Q
lead to the load collapsing?
 How to lessen the shock when movement starts or stops?
 How to change the acceleration gradient depending on winding or unwinding?
 Custom acceleration and deceleration patterns can be set for each system.
A
 The "Acceleration curve selection [A097]" and "Deceleration curve selection [A098]" allow
individual custom pattern settings to be used for both acceleration and deceleration.
 When an acceleration/deceleration pattern is selected, the acceleration/deceleration time is set
from 0 Hz to the maximum frequency.
Code
Acceleration curve
[A097]
selection
Deceleration curve
[A098]
selection
Acceleration curve
[A131]
constant
Deceleration curve
[A132]
constant
EL-S-curve ratio at start of
[A150]
acceleration
EL-S-curve ratio at end of
[A151]
acceleration
EL-S-curve ratio at start of
[A152]
deceleration
EL-S-curve ratio at end of
[A153]
deceleration
Types of acceleration/deceleration curve patterns and examples of their applications
Pattern
Linear (00)
setting
[A097]
(Acceleration)
[A098]
(Deceleration)
Providing linear
acceleration/
Example
deceleration up to
applications
the frequency
setting value.
Item
The acceleration pattern is a linear.
The acceleration pattern is an S-curve.
The acceleration pattern is a U-curve.
The acceleration pattern is a reverse U-curve.
The acceleration pattern is an EL-S-curve.
Used to select the curve pattern deceleration. The
same patterns used for acceleration are available.
Sets the degree of curvature (how much it deviates
from a straight line) for S-curve, U-curve, and reverse
U-curve.
Specifies the curvature of curved sections when using
the EL-S-curve.
(For acceleration)
Specifies the curvature of curved sections when using
the EL-S-curve.
(For deceleration)
S-curve (01)
Time
Time
Time Time
Effective in
preventing the
collapse of cargo
on equipment such
as elevators and
conveyors.
9-3-5
Description
U-curve (02) Reverse U-curve (03)
Time
Time
Effective for controlling the tension of
equipment such as winders and
preventing the wound material from
breaking. It is also suitable for one-shot
take-up and unwinding.
Inverter Functions
Data
00
01
02
03
04
00 to 04
1 to 10
0 to 50 (%)
0 to 50 (%)
EL-S-curve (04)
Time
Time
Time
Time
Provides shock-less
starting and
stopping. It is
similar to the S-
curve, but the
middle section is
linear. Effective
applications such
as elevators.