Mitsubishi Electric fr-e700 series, Instruction Manual

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Acceleration and deceleration Parameter
6 - 72
Acceleration time setting (Pr. 7, Pr. 20)
Use Pr. 7 "Acceleration time" to set the acceleration time required to reach Pr. 20 "Acceleration/de-
celeration reference frequency" from 0 Hz.
Set the acceleration time according to the following formula:
Deceleration time setting (Pr. 8, Pr. 20)
Use Pr. 8 "Deceleration time" to set the deceleration time required to reach 0 Hz from Pr. 20 "Accel-
eration/deceleration reference frequency".
Set the deceleration time according to the following formula:
Fig. 6-29:
Acceleration/deceleration time
I000006C
Example
쑴
When Pr. 20 = 50 Hz (initial value), Pr. 13 = 0.5 Hz
The acceleration can be made up to the maximum operating frequency of 40 Hz in 10 s.
쑶
Example
쑴
When Pr. 20 = 120 Hz, Pr. 10 = 3 Hz
The deceleration can be made up from the maximum operating frequency of 40 Hz to a stop in
10 s.
쑶
Output fr
equenc
y
Acceleration
time setting
Pr. 20
Maximum operating frequency Pr. 13 –
--------------------------------------------------------------------------------------------------------- Acceleration time from stop to
maximum operating frequency
=
Pr. 7
50 Hz
40 Hz 0.5 Hz –
-------------------------------------- 10 s 12.7 s = =
Deceleration
time setting
Pr. 20
Maximum operating frequency Pr. 10
–
---------------------------------------------------------------------------------------------------------
Deceleration time from maximum
operating frequency to stop
=
Pr. 8
120 Hz
40 Hz 3 Hz –
--------------------------------- 10 s 32.4 s = =