Omron SYSDRIVE 3G3RV, User Manual

Page: 238 / 446

6
-22
n
Entering S-curve Characteristics in the Acceleration and Deceleration Time
By
performing acceleration and deceleration using an S-curve pattern, you can reduce shock when starting and
stopping
the machine.
Using
the Inverter, you can set an S-curve characteristic time for each of the following: Acceleration start
time,
deceleration start time, acceleration end time, and deceleration end time.
Setting Example
The
S-curve characteristic when switching operation (forward/reverse) is shown in the following diagram.
Fig 6.23 S-curve Characteristic during Operation Switching
K K K K
Accelerating and Decelerating Heavy Loads (Dwell Function)
The
dwell function stores the output frequency when starting or stopping heavy loads. By temporarily storing
the
output frequency, the motor can be prevented from stalling.
The
deceleration stop must be selected when using the dwell function. Set b1-03 (Stopping Method Selection)
to
0.
n
Related Parameters
INFO
Set the S-curve characteristic time to lengthen acceleration/deceleration time as follows:
Acceleration time = Selected acceleration time + (Acceleration start time S-curve characteristic time +
Acceleration end time S-curve characteristic time) / 2
Deceleration time = Selected deceleration time + (Deceleration start time S-curve characteristic time +
Deceleration end time S-curve characteristic time) / 2
Param-
eter
Num-
ber
Name
Description
Setting
Range
Factory
Setting
Change
during
Opera-
tion
Control Methods
V/f
V/f
with
PG
Open
Loop
Vec-
tor
LCD Display
b6-01
Dwell
frequency at start
The
dwell function is used to output a frequency
temporarily
when driving a motor with a heavy
load.
0.0
to
400.0
0.0
Hz
No A A A
Dwell
Ref@Start
b6-02
Dwell
time at start
0.0
to
10.0
0.0
s
No A A A
Dwell
Time@Start
b6-03
Dwell
frequency at stop
0.0
to
400.0
0.0
Hz
No A A A
Dwell
Ref@Stop
b6-04
Dwell
time at stop
0.0
to
10.0
0.0
s
No A A A
Dwell
Time@Stop
C2-02
C2-01
C2-03
C2-04
C2-02
C2-01
C2-03
C2-04
Forward
Reverse
Output frequency
ON
Run
command
Time
Output
frequency
OFF
b6-01 b6-03
b6-02 b6-04