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E-2
5
5.2 Setting acceleration/deceleration time
: Automatic acceleration/deceleration
: Acceleration time 1
: Deceleration time 1
5.2.1 Automatic acceleration/deceleration
This automatically adjusts acceleration and deceleration time in line with load size.
=
* Adjusts the acceleration/deceleration time automatically within the range of 1/8 to 8 times as long as the
time set with the or , depending on the current rating of the inverter.
=
* Automatically adjusts speed during acceleration only. During deceleration, speed is not adjusted
automatically but reduced at the rate set with .
DecelerationAcceleration
When load is small
Time [s]
0
DecelerationAcceleration
When load is large
Output
frequency [Hz]
Output
frequency [Hz]
Time [s]
0
Acceleration/deceleration time
→
decrease Acceleration/deceleration time
→
increase
Set (automatic acceleration/deceleration) to or .
[Parameter setting]
Title Function Adjustment range Default setting
Automatic acceleration/deceleration
:Disabled (Manual setting)
:Automatic setting
:Automatic setting (during
acceleration only)
When 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 (, ).
When using a braking resistor or braking unit, do not set the =. Or the regenerative braking resistor may be
overloaded.
Use this parameter after actually connecting the motor.
Setting acceleration/deceleration time (, ) in conformance with mean load allows optimum setting that
conforms to further changes in load.
When 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 programs the time that it takes for the inverter output frequency to go from
0Hz to maximum frequency .
2) For deceleration time 1 programs the time that it takes for the inverter output frequency to got from
maximum frequency to 0Hz.