(F) Setting of acceleration/deceleration time and acceleration/deceleration pattern
300
PARAMETERS
5.8.6 Shortest acceleration/deceleration and
optimum acceleration/deceleration (automatic
acceleration/deceleration)
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.
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. Name
Initial
value
Setting range Description
292
F500
Automatic acceleration/
deceleration
0
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 page 303.)
7, 8 Brake sequence 1, 2 (Refer to page 473.)
61
F510
Reference current
9999
0 to 500 A
Set the reference current during shortest
(optimum) acceleration/deceleration.
0 to 3600 A
9999
Rated output current value reference of the
inverter
62
F511
Reference value at acceleration
9999
0 to 220%
Set the speed limit value (optimum value)
during shortest (optimum) acceleration.
9999
Shortest acceleration/deceleration: 150% as
the limit value
Optimum acceleration/deceleration: 100% as
the optimum value
63
F512
Reference value at deceleration
9999
0 to 220%
Set the speed limit value (optimum value)
during shortest (optimum) deceleration.
9999
Shortest acceleration/deceleration: 150% as
the limit value
Optimum acceleration/deceleration: 100% as
the optimum value
293
F513
Acceleration/deceleration
separate selection
0
0
Shortest (optimum) acceleration/deceleration
for both acceleration and deceleration
1
Shortest (optimum) acceleration/deceleration
for acceleration only
2
Shortest (optimum) acceleration/deceleration
for deceleration only
V/F
V/F
Magnetic flux
Magnetic flux
Sensorless
Sensorless
Vector
Vector
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