Mitsubishi FR-A800

(F) Setting of acceleration/deceleration time and acceleration/deceleration pattern
302
PARAMETERS
NOTE
• Even if the optimum acceleration/deceleration has been selected, inputting the JOG signal (Jog operation), RT signal
(second function selection) or X9 signal (third function selection) during an inverter stop will switch to the normal operation
and give priority to JOG operation, second function selection or third function selection. Note that during operation, an input of
JOG and RT signal does not have any influence even when the optimum acceleration/deceleration is enabled.
• Because of the learning method, the impact of the optimum acceleration/deceleration is not apparent in the first operation
after setting to the optimum acceleration/deceleration mode.
• The optimum value are calculated for only acceleration from 0 to 30 Hz or higher or deceleration from 30 Hz or higher to 0 Hz.
• The optimum acceleration/deceleration will not operate if the motor was not connected or the output current is less than 5%
of the rated current of the inverter.
• A Regenerative overvoltage trip during deceleration or stop (E.OV3) may occur during deceleration even if the optimum
acceleration/deceleration is selected with Pr.293 ="1 (optimum acceleration/deceleration during acceleration only)" setting. In
such case, set Pr.8 setting longer.
Shortest and optimum acceleration/deceleration adjustment (Pr.61 to
Pr.63)
• The application range can be expanded by setting the parameters for adjustment of Pr.61 to Pr.63.
 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.
NOTE
• When Real sensorless vector control or vector control is selected with the shortest acceleration/deceleration, Pr.61 to Pr.63
are invalid.
• Even if Pr.61 to Pr.63 are set once, changing the setting to other than the shortest acceleration/deceleration (Pr.292"1 or
11") automatically resets to the initial setting (9999). Set Pr.61 to Pr.63 after setting Pr.292.
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Parameters referred to
Pr.0 Torque boost page 597
Pr.7 Acceleration time, Pr.8 Deceleration time page 285
Pr.22 Stall prevention operation level page 348
Pr.22 Torque limit level page 185
Pr. Name Setting range Description
61
Reference
current
0 to 500 A
Set the rated motor current value such as when the motor capacity and inverter
capacity differ.
Shortest acceleration/deceleration: Set the reference current (A) of the stall
prevention operation level during acceleration/deceleration.
Optimum acceleration/deceleration: Set the reference current (A) of the
optimum current during acceleration/deceleration.
0 to 3600 A

9999 (initial value) The rated inverter current value is the reference.
62
63
Reference value
at acceleration
Reference value
at deceleration
0 to 400%
Set this when changing the reference level of acceleration and deceleration.
Shortest acceleration/deceleration: Set the stall prevention operation level
(percentage of current value of Pr.61) during acceleration/deceleration.
Optimum acceleration/deceleration: Set the optimum current level (percentage
of current value of Pr.61) during acceleration/deceleration.
9999 (initial value)
Shortest acceleration/deceleration: Stall prevention operation level is 150% for
the shortest acceleration/deceleration.
Optimum acceleration/deceleration: 100% as the optimum value.