Mitsubishi Electric FR-A700 EC, Instruction Manual

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Acceleration and deceleration Parameter
6 - 196
Acceleration time setting (Pr. 7, Pr. 20)
Use Pr. 7, 44 and 110 to set the acceleration time required to reach Pr. 20 "Acceleration/
deceleration reference frequency" from 0Hz. The setting value of Pr. 13 "Starting frequency"
must be considered.
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 0Hz from Pr. 20
"Acceleration/deceleration reference frequency". When the DC injection brake is activated, the
setting value of Pr. 10 must be considered
Set the deceleration time according to the following formula:
Fig. 6-77:
Acceleration/deceleration time
I000006E
Example
쑴
When Pr. 20 = 50Hz (initial value), Pr. 13 = 0.5Hz
The acceleration can be made up to the maximum operating frequency of 40Hz in 10s.
쑶
Example
쑴
When Pr. 20 = 120Hz, Pr. 10 = 3Hz
The deceleration can be made up from the maximum operating frequency of 40Hz to a stop
in 10s.
쑶
Pr.20
Hz
t
0
Pr.7
Pr.44
Pr.110 Pr.8
Pr.45
Pr.111
Output frequency
Acceleration
time setting
Pr. 20
Maximum operating frequency Pr. 13 –
------------------------------------------------------------------------------------------------------
Acceleration time from stop to
maximum operating frequency
×
=
Pr. 7
50Hz
40Hz 0,5Hz –
-----------------------------------
10s
×
12.7s
=
=
Deceleration
time setting
Pr. 20
Maximum operating frequency Pr. 10
–
------------------------------------------------------------------------------------------------------
Deceleration time from maximum
operating frequency to stop
×
=
Pr. 8
120Hz
40Hz 3Hz –
-------------------------------
10s
×
32.4s
=
=