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

(F) Setting of acceleration/deceleration time and acceleration/deceleration pattern
5.8.6
Shortest acceleration/deceleration and
optimum 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.
Pr.
292 Automatic acceleration/
F500 deceleration
61
Reference current
F510
62
Reference value at acceleration
F511
63
Reference value at deceleration
F512
293 Acceleration/deceleration
F513 separate selection

The setting range for the FR-A820-03160(55K) or lower and FR-A840-01800(55K) or lower.

The setting range for the FR-A820-03800(75K) or higher and 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.
• This function adjusts the acceleration/deceleration time to accelerate/decelerate the motor with the maximum torque that
can be output with the inverter. Pr.7 Acceleration time and Pr.8 Deceleration time settings are used as reference, and
their 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.
300
PARAMETERS
Initial
Name
value
0
9999
9999
9999
0
V/F V/F V/F Magnetic flux Magnetic flux Magnetic flux Sensorless
Setting range
0 Normal operation
Shortest acceleration/deceleration (without
1
brakes)
Shortest acceleration/deceleration (with
11
brakes)
3 Optimum acceleration/deceleration
5, 6 Lift operation 1, 2 (Refer to
7, 8 Brake sequence 1, 2 (Refer to
0 to 500 A

Set the reference current during shortest
(optimum) acceleration/deceleration.
0 to 3600 A

Rated output current value reference of the
9999
inverter
Set the speed limit value (optimum value)
0 to 220%
during shortest (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)
0 to 220%
during shortest (optimum) deceleration.
Shortest acceleration/deceleration: 150% as
the limit value
9999
Optimum acceleration/deceleration: 100% as
the optimum value
Shortest (optimum) acceleration/deceleration
0
for both acceleration and deceleration
Shortest (optimum) acceleration/deceleration
1
for acceleration only
Shortest (optimum) acceleration/deceleration
2
for deceleration only
Sensorless Vector Sensorless Vector Vector
Description
page 303.)
page 473.)