Shortest Acceleration/Deceleration And Optimum Acceleration/Deceleration (Automatic Acceleration/Deceleration) - Mitsubishi Electric FR-A800 Series Instruction Manual

5.8.6 Shortest acceleration/deceleration and optimum
acceleration/deceleration (automatic acceleration/
deceleration)
V/F V/F V/F Magnetic flux Sensorless
Magnetic flux Magnetic flux
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.
Pr.
292 Automatic acceleration/
F500 deceleration
61
Reference current
F510
62 Reference value at
F511 acceleration
63 Reference value at
F512 deceleration
293 Acceleration/deceleration
F513 separate selection
*1 The setting range of the FR-A820-03160(55K) or lower and the FR-A840-01800(55K) or lower
*2 The setting range of the FR-A820-03800(75K) or higher and the FR-A840-02160(75K) or higher
 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.
• Since the FR-A820-00490(7.5K) or lower, FR-A840-00250(7.5K) or lower capacity inverters are equipped with built-in
brake resistors, set Pr.292 to "11". Set "11" also when a high-duty brake resistor or brake unit is connected. The
deceleration time can further be shortened.
384
5. PARAMETERS
5.8 (F) Setting of acceleration/deceleration time and acceleration/deceleration pattern
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Sensorless Vector Sensorless
Vector Vector
Initial
Name
value
0
9999
9999
9999
0
search engine
Setting range
0 Normal operation
1 Shortest acceleration/deceleration (without brakes)
11 Shortest acceleration/deceleration (with brakes)
3 Optimum acceleration/deceleration
5, 6 Lift operation 1, 2 (Refer to
7, 8 Brake sequence 1, 2 (Refer to
*1
0 to 500 A
Set the reference current during shortest (optimum)
acceleration/deceleration.
*2
0 to 3600 A
9999 Rated output current value reference of the inverter
Set the speed limit value (optimum value) during shortest
0 to 400%
(optimum) acceleration.
Shortest acceleration/deceleration: 150% as the limit value,
9999 optimum acceleration/deceleration: 100% as the optimum
value
Set the speed limit value (optimum value) during shortest
0 to 400%
(optimum) deceleration.
Shortest acceleration/deceleration: 150% as the limit value,
9999 optimum acceleration/deceleration: 100% as the optimum
value
Shortest (optimum) acceleration/deceleration for both
0
acceleration and deceleration
Shortest (optimum) acceleration/deceleration for
1
acceleration only
Shortest (optimum) acceleration/deceleration for
2
deceleration only
Description
page 387.)
page 572.)