Mitsubishi Electric FR-A820-00046 (0.4K) Instruction Manual page 368

NOTE
• Even if automatic 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 JOG and RT signal input is invalid
even if JOG signal and RT signal are input during operation in the optimum acceleration/deceleration mode.
• 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 mode adjustment (Pr.61
to Pr.63)
• The application range can be expanded by setting the parameters for adjustment of Pr.61 to Pr.63.
Pr. Name
61 Reference current
Reference value
62 at acceleration
63 Reference value
at deceleration
*1 The setting range of FR-A820-03160(55K) or lower and FR-A840-01800(55K) or lower
*2 The setting range of 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.
Parameters referred to
Pr.0 Torque boostpage 672
Pr.7 Acceleration time, Pr.8 Deceleration
Pr.22 Stall prevention operation levelpage 409
Pr.22 Torque limit levelpage 235
Setting range
Set the rated motor current value such as when the motor capacity and inverter capacity
*1
0 to 500 A
differ.
Shortest acceleration/deceleration: Set the reference current (A) of the stall prevention
operation level during acceleration/deceleration.
*2
0 to 3600 A
Optimum acceleration/deceleration: Set the reference current (A) of the optimum current
during acceleration/deceleration.
9999 (initial
The rated inverter current value is the reference.
value)
Set this when changing the reference level of acceleration and deceleration.
Shortest acceleration/deceleration: Set the stall prevention operation level (percentage of
0 to 400% 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.
Shortest acceleration/deceleration: Stall prevention operation level is 150% for the
9999 (initial
shortest acceleration/deceleration.
value)
Optimum acceleration/deceleration: 100% as the optimum value.
timepage 349
5.8 (F) Setting of acceleration/deceleration time and acceleration/deceleration pattern
Description
5. PARAMETERS
1
2
3
4
5
6
7
8
9
10
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