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E6581301
E-2
5
5.2 Setting acceleration/deceleration time
CW
CWCW
CW
: Automatic acceleration/deceleration
CEE
CEECEE
CEE
: Acceleration time 1
FGE
FGEFGE
FGE
: Deceleration time 1
5.2.1 Automatic acceleration/deceleration
This automatically adjusts acceleration and deceleration time in line with load size.
CW
CWCW
CW =
* Adjusts the acceleration/deceleration time automatically within the range of 1/8 to 8 times as long as the
time set with the CEE
CEECEE
CEE or FGE
FGEFGE
FGE, depending on the current rating of the inverter.
CW
CWCW
CW =
* Automatically adjusts speed during acceleration only. During deceleration, speed is not adjusted
automatically but reduced at the rate set with FGE
FGEFGE
FGE.
Deceleration Acceleration
HJ
HJHJ
HJ
When load is small
Time [s]
0
Deceleration Acceleration
HJ
HJHJ
HJ
When load is large
Output
frequency [Hz]
Output
frequency [Hz]
Time [s]
0
Acceleration/deceleration time
→
→→
→
decrease Acceleration/deceleration time
→
→→
→
increase
Set CW
CWCW
CW (automatic acceleration/deceleration) to
or
.
[Parameter setting]
Title Function Adjustment range Default setting
CW Automatic acceleration/deceleration
:Disabled (Manual setting)
:Automatic setting
:Automatic setting (during
acceleration only)
ŬWhen automatically setting acceleration/deceleration time, always change the acceleration/deceleration time so
that it conforms with the load.
The acceleration/deceleration time changes constantly with load fluctuations.
For inverters that requires a fixed acceleration/deceleration time, use the manual settings (CEE, FGE).
ŬWhen using a braking resistor or braking unit, do not set the CW=. Or the regenerative braking resistor may be
overloaded.
ŬUse this parameter after actually connecting the motor.
ŬSetting acceleration/deceleration time (CEE, FGE) in conformance with mean load allows optimum setting that
conforms to further changes in load.
ŬWhen the inverter is used with a load that fluctuates considerably, it may fail to adjust the acceleration or
deceleration time in time, and therefore may be tripped.
• Function
1) For acceleration time 1 CEE programs the time that it takes for the inverter output frequency to go from
0Hz to maximum frequency HJ.
2) For deceleration time 1 FGE programs the time that it takes for the inverter output frequency to got from
maximum frequency HJ to 0Hz.