Acceleration and deceleration
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.
Pr.20
Set the acceleration time according to the following formula:
Acceleration
time setting
Example
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.
Pr. 7
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:
Deceleration
time setting
Example
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.
Pr. 8
6 - 196
Hz
0
Pr.7
Pr.44
Pr.110
Pr. 20
=
------------------------------------------------------------------------------------------------------
Maximum operating frequency Pr. 13
50Hz
×
---------------------------------- -
=
10s
40Hz 0,5Hz
–
Pr. 20
------------------------------------------------------------------------------------------------------
=
Maximum operating frequency Pr. 10
120Hz
×
------------------------------ -
=
10s
40Hz 3Hz
–
Fig. 6-77:
Acceleration/deceleration time
t
Pr.8
Pr.45
Pr.111
Acceleration time from stop to
×
maximum operating frequency
–
=
12.7s
Deceleration time from maximum
×
operating frequency to stop
–
=
32.4s
Parameter
I000006E