Mitsubishi Electric FR-E800, Инструкция по эксплуатации

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9. (F) Settings for Acceleration/Deceleration
9.6 Shortest acceleration/deceleration (automatic acceleration/deceleration)
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2
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5
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7
8
9
10
9.6
Shortest acceleration/deceleration (automatic
acceleration/deceleration)
The inverter can be operated with the same conditions as when the appropriate value is set to each parameter even when
acceleration/deceleration time and V/F pattern are not set. This function is useful for operating the inverter without setting
detailed parameters.
 Shortest acceleration/deceleration (Pr.292 = "1, 11", Pr.293)
• Set this parameter to accelerate/decelerate the motor at the shortest time. This function is useful when the motor needs
to be accelerated/decelerated at a shorter time, such as for a machine, but the designed value of the machine constant is
not known.
• At acceleration/deceleration, this function adjusts the motor to accelerate/decelerate with the maximum inverter output
torque using the Pr.7 Acceleration time and Pr.8 Deceleration time setting as reference. ( Pr.7 and Pr.8 settings are not
changed.)
• Use Pr.293 Acceleration/deceleration separate selection to apply the shortest acceleration/deceleration to one of
acceleration and deceleration only.
When "0" (initial value) is set, the shortest acceleration/deceleration is performed for both acceleration and deceleration.
• Set "11" in Pr.292 when a brake resistor or brake unit is connected. The deceleration time can further be shortened.
• When the shortest acceleration/deceleration is selected under V/F control and Advanced magnetic flux vector control, the
stall prevention operation level during acceleration/deceleration becomes 150% (adjustable using Pr.61 to Pr.63 ). The
setting of Pr.22 Stall prevention operation level and stall level by analog input are used only during a constant speed
operation.
Under Real sensorless vector control and Vector control, the torque limit level (
Pr.22 , etc.) is applied during acceleration/
deceleration. The adjustments by Pr.61 to Pr.63 are disabled.
• It is inappropriate to use for the following applications.
V/F V/F V/F Magnetic flux Magnetic flux Magnetic flux Sensorless Sensorless Sensorless Vector Vector Vector
Pr. Name
Initial
value
Setting range Description
292
F500
A110
Automatic acceleration/
deceleration
0
0 Normal operation
1 Shortest acceleration/deceleration (without brakes)
11 Shortest acceleration/deceleration (with brakes)
7, 8 Brake sequence 1, 2 (Refer to page 370 .)
61
F510
Reference current 9999
0 to 500 A
Set the reference current during shortest acceleration/
deceleration.
9999 Rated output current value reference of the inverter
62
F511 Reference value at
acceleration
9999
0% to 400% Set the speed limit value during shortest acceleration.
9999 The limit value is 150% (120% for the LD rating).
63
F512 Reference value at
deceleration
9999
0% to 400% Set the speed limit value during shortest deceleration.
9999 The limit value is 150% (120% for the LD rating).
293
F513 Acceleration/deceleration
separate selection
0
0
Shortest acceleration/deceleration for both acceleration
and deceleration
1 Shortest acceleration/deceleration for acceleration only
2 Shortest acceleration/deceleration for deceleration only
- Machines with large inertia (10 times or more), such as a fan. Since stall prevention operation is activated for a long
time, this type of machine may be shut off due to motor overloading, etc.
- When the inverter is always operated at a specified acceleration/deceleration time.