Shortest Acceleration/Deceleration And Optimum Acceleration/Deceleration (Automatic Acceleration/Deceleration) - Mitsubishi Electric 800 Series 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. Name
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-A860-01080 or lower.

The setting range for the FR-A860-01440 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.
• When the brake resistor or the brake unit is connected, set Pr.292 to "11". The deceleration time can further be shortened.
Initial
Setting range
value
0
1
11
0
3
5, 6
7, 8
0 to 500 A

0 to 3600 A

9999
9999
0 to 220%
9999
9999
0 to 220%
9999
9999
0
0 1
2
V/F V/F V/F Magnetic flux Magnetic flux Magnetic flux Sensorless Sensorless Sensorless Vector Vector Vector
Description
Normal operation
Shortest acceleration/deceleration (without
brakes)
Shortest acceleration/deceleration (with
brakes)
Optimum acceleration/deceleration
Lift operation 1, 2 (Refer to page
Brake sequence 1, 2 (Refer to
Set the reference current during shortest
(optimum) acceleration/deceleration.
Rated output current value reference of the
inverter
Set the speed limit value (optimum value)
during shortest (optimum) acceleration.
Shortest acceleration/deceleration: 150% as
the limit value
Optimum acceleration/deceleration: 100% as
the optimum value
Set the speed limit value (optimum value)
during shortest (optimum) deceleration.
Shortest acceleration/deceleration: 150% as
the limit value
Optimum acceleration/deceleration: 100% as
the optimum value
Shortest (optimum) acceleration/deceleration
for both acceleration and deceleration
Shortest (optimum) acceleration/deceleration
for acceleration only
Shortest (optimum) acceleration/deceleration
for deceleration only
PARAMETERS
288.)
page 457.)
5
GROUP
F
285