94
"A" Group: Standard Functions Section 3-5
Switch between accelerations and
decelerations could be done also
using terminal [2CH], when this input
is turned ON the inverter changes the
rate of acceleration and deceleration
from the initial settings (
F002 and
F003) to use the second set of accel-
eration/ deceleration values. When
the terminal is turned OFF, the
inverter is returned to the original
acceleration and deceleration time
(
F002 acceleration time 1, and F003
deceleration time 1). Use A092 (acceleration time 2) and A093 (deceleration
time 2) to set the second stage acceleration and deceleration times.
In the graph shown above, the [2CH] becomes active during the initial acceler-
ation. This causes the inverter to switch from using acceleration 1 (
F002) to
acceleration 2 (
A092).
3-5-13 Accel/Decel
Standard acceleration and decel-
eration is linear. The inverter CPU
can also calculate an S-curve
acceleration or deceleration curve
as shown. This profile is useful for
favoring the load characteristics in
particular applications.
Curve settings for acceleration
and deceleration are indepenently
Option
Code
Terminal
Symbol
Function
Name
State Description
09 2CH Two-stage
Accelera-
tion and
Deceleration
ON Frequency output uses 2nd-stage
acceleration and deceleration val-
ues
OFF Frequency output uses the initial
acceleration 1 and deceleration
1values
Valid for inputs: C001~C007
Required settings: A092, A093, A094=00
Notes:
• Function A094 selects the method for second stage acceleration. It must be set =
00 to select the input terminal method in order for the [2CH] terminal assignment to
operate.
[2CH]
1
0
Output
frequency
t
[FW,RV]
1
0
Target
frequency
initial
second
A097 = 00
Accel. curve selection
S-curve
Linear
t
0
A097 = 01
Acceleration period
Target
freq.
Output
frequency
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