Explanation of Function
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FAZZY MOST SUITABLE ACCELERATION AND DECELERATION
Fazzy acceleration and deceleration function eliminates setting
of acceleration and deceleration time in using inverter.
Inverter acceleration time should be set every time before, but this
function applies the theory of fuzzy, using inverter capability at its
maximum, can set acceleration and deceleration time automatically.
The acceleration time is, a time for acceleration at the current specified by the overload restriction constant when it is valid, and a time for
acceleration within 150% of the regular current when it is invalid.
The deceleration time is a time for decelerating so that the current does not exceed 150%
of the specified one or the DC voltage in the inverter circuit does not exceed 358V (770V for the 400V class).
The function sets the acceleration and deceleration time automatically in response to a change in the load or inertia in real time.
Setting item
Function code
Setting range
Contents
00 Normal
running
01
Energy conservation running
Running mode
Selection
A085
02 Fuzzy
running
Precautions
(1) This function is not suitable for a machine which requires a constant acceleration and deceleration time.
The acceleration and deceleration time varies with the magnitude of the load or inertia.
(2) When the inertia of machine is more than about 20 times of that of the motor shaft, a trip may occur.
(3) The acceleration and deceleration time of the same motor always varies with a change of the current.
(4) The fuzzy most suitable acceleration and deceleration setting function is valid only under the V/F control.
(5) If the jogging running is executed when the fuzzy most suitable acceration and decelerarion setting function is selected, the normal
jogging operation cannot be performed due to the fuzzy acceleration.
(6) When the load is more than the rated one, the deceleration time may be increased.
(7) When the acceleration and deceleration are repeated frequently, a trip may occur.
(8) If an internal regenerating braking circuit is used, or an external braking unit is used, the moter cannot stop within the deceleration time
set with a braking resistor. In this case, do not use the fuzzy suitable accelation and deceleration function.
Principle
The acceleration and deceleration speed is set in accordance with the fuzzy rule from the distance to the overload restriction level and the
start slopes of current and voltage.
A044/A244/A344: First / second / third control method
A085 : Running mode selection
b021/b024 : Overload restriction selection 1/2
b022/b025: Overload restriction level 1/2
Relation code
